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Sentence Improvement is an important English practice topic for candidates preparing for SSC CGL 2027 and other competitive examinations. These questions test your ability to identify grammatical errors, improve sentence structure and select the most appropriate expression without changing the original meaning.
To solve sentence improvement questions accurately, candidates should understand subject-verb agreement, tenses, articles, prepositions, pronouns, conjunctions and parallel structure. Regular practice with grammar rules and multiple-choice questions can help you recognise incorrect constructions and choose the best alternative.
In this article, Katara Academy covers essential sentence improvement rules, solved examples, common mistakes and practice MCQs with explanations to support your SSC CGL 2027 English preparation.
Sentence improvement is a type of English grammar exercise in which a part of a sentence is underlined or highlighted. Candidates must select the alternative that makes the sentence grammatically correct, clearer or more appropriate while preserving its intended meaning.
Depending on the question, the original phrase may contain an error in tense, subject-verb agreement, preposition, article, pronoun, word order or idiomatic usage.
Example: She do not like travelling by bus.
Incorrect phrase: do not
Correct phrase: does not
Improved sentence: She does not like travelling by bus.
The subject "she" is singular, so the sentence requires "does not" rather than "do not". The meaning remains unchanged.
Use a systematic approach instead of choosing an option simply because it sounds natural.
Read the entire sentence to understand its meaning. The error may become clear only when you consider the relationship between different parts of the sentence.
Check the subject and verb, tense, pronouns, articles, prepositions and sentence structure. Look for the specific part that needs correction.
Once you identify the likely error, apply the appropriate grammar rule. For example, a singular subject generally requires a singular verb in the simple present tense.
Read each alternative carefully. Some options may correct one error but introduce another. Eliminate choices that are grammatically incorrect or change the intended meaning.
Insert the selected alternative into the sentence and read it again. Confirm that the final sentence is grammatically correct, clear and consistent with the original meaning.
The verb must agree with its subject in number and person.
Incorrect: Each of the students have submitted the assignment.
Correct: Each of the students has submitted the assignment.
"Each" is singular in this construction, so it takes "has". Do not let a plural noun near the subject distract you from the actual grammatical subject.
The tense should match the time and context of the action. Avoid unnecessary tense changes within a sentence.
Incorrect: She completed the work and goes home.
Correct: She completed the work and went home.
Both actions occurred in the past, so the past tense is appropriate for both verbs.
Use "a" before a singular countable noun beginning with a consonant sound, "an" before a singular countable noun beginning with a vowel sound, and "the" when referring to something specific or identifiable.
Incorrect: He is an university student.
Correct: He is a university student.
"University" begins with a /juː/ sound, so "a" is correct.
Some verbs, adjectives and expressions require particular prepositions. Learn these combinations through examples.
Incorrect: She is good in mathematics.
Correct: She is good at mathematics.
Other useful combinations include interested in, depend on, belong to, capable of and insist on.
A pronoun should clearly refer to the intended noun and fit the sentence grammatically.
Incorrect: Every candidate must bring their admit card, according to a traditional singular-pronoun exercise.
Improved formal alternative: Every candidate must bring his or her admit card.
In modern English, singular "they" is also widely accepted. In an examination question, follow the context and the grammar convention being tested rather than assuming every use of singular "they" is incorrect.
Make comparisons between logically equivalent people, things or qualities. Avoid incomplete or misleading comparisons.
Incorrect: The population of Pune is greater than Mumbai.
Correct: The population of Pune is greater than that of Mumbai.
"That" refers to the population, making the comparison logically complete.
When items appear in a series or are connected by a conjunction, maintain a consistent grammatical structure.
Incorrect: She enjoys reading, writing and to paint.
Correct: She enjoys reading, writing and painting.
All three activities use the same grammatical form.
Conditional sentences express a condition and its result. The verb forms should match the type of condition being described.
Incorrect: If I will have time, I will help you.
Correct: If I have time, I will help you.
In a standard first conditional sentence, the present simple is generally used in the "if" clause and "will" in the main clause.
In standard formal English, avoid using two negative forms when only one is intended.
Incorrect: I do not know nothing about the matter.
Correct: I do not know anything about the matter.
Avoid unnecessary words that repeat the same meaning.
Incorrect: We must return back before sunset.
Correct: We must return before sunset.
"Return" already conveys the idea of going back, so "back" is unnecessary in this sentence.
The following examples demonstrate how grammar rules can be applied to examination-style questions.
Example 1: Neither of the two answers are correct.
Improved sentence: Neither of the two answers is correct.
Explanation: In traditional competitive-exam grammar, "neither" is treated as singular in this construction and takes "is".
Example 2: He has been working here since five years.
Improved sentence: He has been working here for five years.
Explanation: Use "for" with a duration and "since" with a starting point.
Example 3: The teacher explained me the answer.
Improved sentence: The teacher explained the answer to me.
Explanation: The standard construction is "explain something to someone".
Example 4: She is senior than me.
Improved sentence: She is senior to me.
Explanation: "Senior" is generally followed by "to", not "than".
Example 5: Hardly had I reached the station than the train arrived.
Improved sentence: Hardly had I reached the station when the train arrived.
Explanation: The standard paired construction is "hardly ... when".
Example 6: He prefers tea than coffee.
Improved sentence: He prefers tea to coffee.
Explanation: The verb "prefer" commonly uses the construction "prefer one thing to another".
Example 7: The furniture in these rooms are expensive.
Improved sentence: The furniture in these rooms is expensive.
Explanation: "Furniture" is an uncountable noun and takes a singular verb in standard English.
Example 8: No sooner did the bell ring when the students left.
Improved sentence: No sooner did the bell ring than the students left.
Explanation: The standard paired construction is "no sooner ... than".
Choose the most appropriate replacement for the bold part of each sentence. If the sentence is already correct, select the option that indicates no improvement is needed.
Q1. Each of the players have received a certificate.
Q2. She has been preparing for the examination since three months.
Q3. He is good in solving mathematical problems.
Q4. The teacher asked the students to complete the assignment and submitting it by Monday.
Q5. If he will study regularly, he will improve his performance.
Q6. She prefers reading novels than watching television.
Q7. The information provided by the officer were useful.
Q8. He is one of the best students which have participated in the competition.
Q9. No sooner had the meeting started when the power went out.
Q10. The new policy will effect the performance of the organisation.
Q11. She is senior than her colleague.
Q12. The committee have taken its decision.
Sentence improvement questions become easier when you understand grammar rules and apply them systematically. Focus on subject-verb agreement, tense consistency, prepositions, articles, pronouns, comparisons and parallel structure. Practise with examples, review your errors and check whether the improved sentence preserves the original meaning.
Consistent practice can help you build grammatical accuracy and confidence for SSC CGL 2027. Combine sentence improvement exercises with vocabulary, comprehension and other English topics for balanced preparation.
Keep learning with Katara Academy and strengthen your English grammar for SSC CGL 2027.
Reading comprehension is an important part of English preparation for SSC CGL 2027. It tests a candidate's ability to understand a passage, identify the main idea, locate relevant information, interpret vocabulary and draw logical conclusions. Many candidates know English grammar but struggle with comprehension because they spend too much time rereading the passage or selecting answers without sufficient evidence.
The solution is to develop a structured reading approach. Instead of reading every sentence repeatedly, learn to identify the purpose of the passage, recognise keywords, understand question types and eliminate unsupported options. This article explains practical strategies, common mistakes and practice questions to help you improve reading accuracy and speed.
Reading comprehension is the ability to understand written information and interpret its meaning accurately. In competitive examinations, candidates are usually given a passage followed by questions based on the information it contains.
These questions may ask you to identify the central idea, understand a specific detail, infer an unstated conclusion, interpret a word in context or determine the author's attitude.
For example, if a passage explains how regular exercise improves physical fitness and concentration, the main idea is likely to be the benefits of regular exercise. A question about one specific benefit, however, may require you to locate a particular sentence in the passage.
Remember that the correct answer must be supported by the passage. Your personal opinion or outside knowledge should not replace the information provided by the author.
Understanding the type of question helps you decide where to focus your attention.
| Question Type | What It Tests | Useful Approach |
|---|---|---|
| Main idea | The central message of the passage | Identify the topic and the author's overall point. |
| Specific information | A stated fact or detail | Locate keywords from the question in the passage. |
| Inference | A conclusion supported by the text | Combine relevant clues without making unsupported assumptions. |
| Vocabulary in context | The meaning of a word as used in the passage | Read the surrounding sentence and understand the context. |
| Author's tone | The writer's attitude towards the subject | Notice descriptive words, criticism, praise or neutral reporting. |
| Title selection | The best summary of the passage | Choose a title that covers the whole passage, not just one detail. |
| True or false statement | Whether a statement agrees with the passage | Check the exact wording and avoid options that change the meaning. |
Before reading the passage in detail, briefly look at the questions if the examination format permits it. Identify whether they ask about the main idea, a specific fact, vocabulary or an inference. This helps you know what information to look for.
Read the passage once at a steady pace. Focus on the topic, the author's purpose and the relationship between the paragraphs. Avoid stopping at every unfamiliar word unless it prevents you from understanding the overall message.
Look for names, dates, figures, repeated concepts and distinctive terms mentioned in the questions. These details can help you locate the relevant part of the passage quickly.
The correct option may express the passage's meaning using different words. For example, a passage may say that a plan "reduced expenses", while an option says that it "lowered costs". Both expressions communicate the same idea.
Remove options that contradict the passage, introduce information that is not mentioned or make a claim that is too broad. Pay attention to words such as "always", "never", "only" and "all", which can make an option stronger than the passage supports.
An inference is a conclusion that follows from the available information. It should be logically supported by the passage even if it is not stated word for word. Avoid choosing an option merely because it sounds reasonable in real life.
If time permits, revisit questions where two options seemed similar. Confirm that the selected option matches the passage and answers the question directly.
Keywords are useful because they guide you towards the relevant information. However, the same word may not appear in the passage and the answer option, so focus on meaning as well as exact wording.
Example: A passage states, "Although online learning offers flexibility, some students find it difficult to remain motivated without a fixed schedule."
The word "although" signals a contrast. The sentence recognises a benefit of online learning while also highlighting a challenge. An option claiming that online learning has no disadvantages would therefore be incorrect.
You do not need to know every word in a passage to answer every question correctly. Use the surrounding information to estimate the meaning of an unfamiliar word.
After completing the exercise, record unfamiliar words in a vocabulary notebook and revise their meanings with example sentences.
Reading comprehension requires both accuracy and efficient use of examination time. Your ideal pace will depend on passage length, difficulty and your current reading ability.
Do not follow a rigid time limit for every passage without considering its length and difficulty. Use practice results to develop a realistic strategy for the examination.
Read the following passage carefully and answer the questions that follow.
Technology has changed the way people access information and learn new skills. Online resources allow students to study at flexible times and revisit difficult concepts whenever necessary. Digital learning can also provide access to educational material for people who live far from major learning centres. However, technology alone does not guarantee effective learning. Students need clear goals, regular practice and the ability to evaluate the reliability of online information. Distractions from social media and frequent notifications can also reduce concentration. A balanced approach that combines digital resources with disciplined study habits can help learners make better use of available opportunities.
Q1. What is the main idea of the passage?
Q2. According to the passage, one benefit of online resources is that students can:
Q3. What can reduce concentration during digital learning?
Q4. The word "reliability" in the passage is closest in meaning to:
Q5. Which conclusion is supported by the passage?
Q6. What does the author suggest about effective learning?
Q7. What is the tone of the passage?
Finding answers faster in reading comprehension requires a combination of careful reading, keyword identification, contextual understanding and logical elimination. Read the passage for its main idea, identify what each question asks, locate relevant evidence and ensure that the selected answer matches the text.
For SSC CGL 2027, practise passages regularly and review the reasons behind incorrect answers. Track your accuracy and time so that you can identify areas requiring improvement. Consistent practice can help you become a more confident and efficient reader.
Keep practising with Katara Academy and strengthen your English preparation for SSC CGL 2027.
Cloze Test is an important type of English comprehension exercise for candidates preparing for SSC CGL 2027. In this question format, a passage contains several blanks, and candidates must choose the most appropriate words to complete it. The correct answers depend on grammar, vocabulary, sentence structure and the overall meaning of the passage.
Many candidates try to solve each blank independently. However, a better approach is to understand the passage first and then use contextual clues to select suitable words. This article explains a practical Cloze Test solving strategy, common mistakes, solved examples and practice MCQs to help you improve your English preparation.
A Cloze Test is a passage-based exercise in which certain words are removed and replaced with blanks. Candidates must choose the correct word for each blank from the available options.
The missing words may test different language skills, including:
Example: Regular practice helps students _____ their accuracy.
Options: (A) improve (B) improving (C) improved (D) improvement
Correct answer: Improve. The sentence requires the base form of the verb after "helps students" in this construction: "helps students improve their accuracy."
A Cloze Test should be treated as a connected passage rather than a collection of unrelated vocabulary questions. The surrounding sentences often provide clues to the correct answer.
Successful Cloze Test solving requires a combination of grammar, vocabulary and reading skills.
You should understand the main idea and purpose of the passage. Reading the complete passage before choosing answers helps you recognise the topic and the author's intended message.
Knowledge of tenses, articles, prepositions, conjunctions, pronouns and subject-verb agreement helps you eliminate grammatically incorrect options.
A strong vocabulary helps you identify words that fit the meaning and tone of the passage. Learn synonyms, antonyms, commonly confused words and frequently used expressions.
Words such as "however", "therefore", "although" and "because" indicate relationships between ideas. Recognising these connections can help you select the appropriate answer.
Follow a consistent process whenever you attempt a Cloze Test. This approach helps you avoid random guessing and improves accuracy over time.
Read the passage once without attempting to fill every blank immediately. Identify the topic, central idea, tone and purpose of the passage.
For example, a passage about environmental protection may contain words related to conservation, pollution, responsibility and sustainability. Understanding the topic helps you predict the type of vocabulary that may fit.
Look at the sentence structure around the blank. Determine whether it requires a noun, verb, adjective, adverb, preposition, article or conjunction.
Example: She is interested _____ learning English.
The correct answer is "in" because the expression is "interested in".
Check whether the selected word agrees with the subject and tense of the sentence. Eliminate options that make the sentence grammatically incorrect.
Example: Each of the candidates _____ ready.
The correct answer is "is" because "each" takes a singular verb in this construction.
Read the words before and after the blank. These words often indicate the required meaning.
Example: The roads were flooded; _____, the school remained closed.
The word "therefore" is suitable because the closure is a result of the flooding.
Determine whether the sentence expresses a cause, result, contrast, example or addition.
Select the connector that matches the relationship between the ideas.
Compare all four options rather than selecting the first word that appears suitable. Remove choices that are grammatically incorrect, unsuitable in meaning or inconsistent with the passage.
After selecting your answers, read the entire passage with all blanks filled. Check whether it is grammatically correct, logically connected and consistent in meaning.
Recognising different types of clues is one of the most useful skills for solving Cloze Tests accurately.
| Clue Type | What to Check | Example |
|---|---|---|
| Grammar clue | Part of speech, tense and agreement | She _____ to school daily. (goes) |
| Vocabulary clue | Meaning of the word in context | The evidence was _____, so the decision was clear. (convincing) |
| Collocation clue | Words commonly used together | Make a decision, not do a decision. |
| Contrast clue | Opposing ideas in the sentence | Although he was tired, he continued working. |
| Cause-and-effect clue | The reason for an event and its result | It rained heavily; therefore, the match was cancelled. |
| Reference clue | Pronouns and the nouns they refer to | Riya bought a book. She read it that evening. |
| Topic clue | The overall theme of the passage | A passage about health may include words such as exercise and nutrition. |
Read the passage and choose the most suitable word for each blank.
Success in competitive examinations requires consistent effort and proper planning. Candidates who follow a regular study schedule are more likely to remain (1) _____ and organised. They should identify their weak areas and work on them (2) _____. Regular revision also helps students (3) _____ important concepts. However, studying for long hours without breaks may reduce concentration. Therefore, candidates should maintain a healthy balance between study and (4) _____. With discipline and patience, they can gradually (5) _____ their performance.
Blank 1: (A) careless (B) focused (C) confused (D) irregular
Correct answer: B — focused. A regular study schedule helps candidates remain focused and organised.
Blank 2: (A) carelessly (B) rarely (C) systematically (D) accidentally
Correct answer: C — systematically. Weak areas should be addressed in a planned and organised manner.
Blank 3: (A) forget (B) revise (C) avoid (D) postpone
Correct answer: B — revise. Revision helps students strengthen their understanding of important concepts.
Blank 4: (A) rest (B) confusion (C) delay (D) pressure
Correct answer: A — rest. A healthy balance between study and rest supports concentration and well-being.
Blank 5: (A) worsen (B) ignore (C) improve (D) interrupt
Correct answer: C — improve. Discipline and patience can gradually improve performance.
Learning point: Notice how grammar, vocabulary and the overall message of the passage work together. The correct answer must fit both the sentence and the complete passage.
Read the passage carefully and choose the correct option for each blank.
Reading is a useful habit that can improve knowledge and communication skills. Students who read regularly are exposed to new words and different ideas. This habit helps them understand information more (1) _____ and express their thoughts clearly. However, reading without concentration may reduce the benefits. Students should choose material that is suitable for their level and interests. They should also make time for regular practice rather than depending (2) _____ last-minute preparation. Over time, consistent reading can (3) _____ vocabulary, improve comprehension and build confidence. These skills are especially useful when candidates prepare for competitive examinations, where they must understand passages and answer questions within a limited (4) _____. Therefore, a balanced reading routine should become an important part of every student's (5) _____ plan.
Q1. Choose the correct word for blank 1.
Q2. Choose the correct word for blank 2.
Q3. Choose the correct word for blank 3.
Q4. Choose the correct word for blank 4.
Q5. Choose the correct word for blank 5.
Q6. Choose the correct word to complete the sentence: The roads were blocked by snow; _____, the buses could not operate.
Q7. Choose the correct word: Every candidate _____ required to carry a valid admit card.
Q8. Choose the correct word: She is good _____ solving numerical problems.
Q9. Choose the correct connector: _____ the task was difficult, the team completed it on time.
Q10. Choose the correct word: The instructions were clear, so the candidates understood them _____.
Editorial correction for Q4: To avoid ambiguity, the practice passage should read: "where they must understand passages and answer questions within a limited time." The correct word for the blank is then time, so use these options instead: (A) time (B) timing (C) timely (D) times. Correct answer: A — time.
Consistency is more important than attempting a large number of passages without reviewing them. Use this short routine alongside your regular SSC CGL English preparation.
As your accuracy improves, practise under a time limit. Do not focus only on speed; build a strong understanding of context and grammar first.
The best way to solve Cloze Tests for SSC CGL 2027 is to combine reading comprehension, grammar knowledge and vocabulary. Read the entire passage first, identify the type of missing word, use contextual clues, eliminate unsuitable options and review the completed passage before finalising your answers.
Regular practice and careful analysis of mistakes can help you improve both speed and accuracy. Include Cloze Tests in your daily English routine and revise grammar and vocabulary alongside them for balanced examination preparation.
Keep practising with Katara Academy and strengthen your English preparation for SSC CGL 2027.
Confusing words are an important part of English vocabulary preparation for SSC CGL 2027 and other competitive examinations. Many English words have similar spellings or pronunciations but different meanings and uses. Candidates who understand these differences can improve their accuracy in vocabulary-based questions, sentence correction and reading comprehension.
Words such as affect and effect, accept and except, advice and advise, and principal and principle are commonly confused by English learners. The best way to master them is to understand their meanings, study example sentences and practise questions regularly.
In this article, Katara Academy explains frequently confused English words with simple definitions, practical examples, revision strategies and MCQs with answers to support your SSC CGL 2027 preparation.
Confusing words are words that people often mix up because they have similar spellings, similar sounds or closely related meanings. However, their grammatical roles or meanings may be different.
Example: Affect and effect.
Examples:
The difference becomes clear when you study each word in context. For SSC CGL preparation, do not rely only on spelling. Identify the meaning required by the sentence and check the grammatical role of the missing word.
Revise the following word pairs carefully. These examples cover differences in meaning, usage and grammatical function.
| Word Pair | Difference | Example |
|---|---|---|
| Affect / Effect | Affect usually means to influence; effect usually means a result. | Lack of sleep can affect concentration. The effect was noticeable. |
| Accept / Except | Accept means to receive or agree; except means excluding. | I accept your invitation. Everyone came except Rahul. |
| Advice / Advise | Advice is a noun; advise is a verb. | She gave me useful advice. I advise you to revise daily. |
| Principal / Principle | Principal means main or a head of an institution; principle means a rule or belief. | The principal addressed the students. Honesty is an important principle. |
| Compliment / Complement | A compliment is praise; a complement completes or enhances something. | She received a compliment. The sauce complements the dish. |
| Stationary / Stationery | Stationary means not moving; stationery refers to writing materials. | The vehicle remained stationary. I bought stationery for class. |
| Loose / Lose | Loose means not tight; lose means to misplace or fail to win. | This shirt is loose. Do not lose your admit card. |
| Then / Than | Then refers to time or sequence; than is used in comparisons. | Finish your work, then rest. Riya is taller than Neha. |
| Beside / Besides | Beside means next to; besides means in addition to. | He sat beside me. Besides English, she studies reasoning. |
| Its / It's | Its indicates possession; it's means it is or it has. | The dog wagged its tail. It's a useful book. |
| Your / You're | Your indicates possession; you're means you are. | Your answer is correct. You're ready for the test. |
| Weather / Whether | Weather refers to atmospheric conditions; whether introduces alternatives or uncertainty. | The weather is pleasant. I do not know whether he will attend. |
| Quiet / Quite | Quiet means silent or calm; quite means fairly or completely, depending on context. | The room is quiet. The question is quite difficult. |
| Later / Latter | Later means after some time; latter refers to the second of two items mentioned. | I will call you later. Of tea and coffee, I prefer the latter. |
| Allusion / Illusion | An allusion is an indirect reference; an illusion is a misleading appearance or perception. | The poem contains an allusion to history. The mirror created an illusion. |
| Desert / Dessert | A desert is a dry region; dessert is a sweet dish served after a meal. | Camels can survive in the desert. We had fruit for dessert. |
| Personal / Personnel | Personal means private or individual; personnel refers to employees or staff. | This is my personal opinion. The personnel attended the meeting. |
| Economic / Economical | Economic relates to the economy; economical means cost-effective or not wasteful. | The country faces economic challenges. This car is economical to run. |
| Eligible / Illegible | Eligible means qualified; illegible means difficult or impossible to read. | She is eligible for the examination. His handwriting is illegible. |
| Emigrate / Immigrate | Emigrate means to leave a country to live elsewhere; immigrate means to enter another country to live there. | They emigrated from India. They immigrated to Canada. |
Some confusing words differ mainly in their grammatical roles. Understanding these roles can help you eliminate incorrect options in sentence-based questions.
Advice and Advise
"Advice" is a noun, while "advise" is a verb.
Practice and Practise
In traditional British English, "practice" is a noun and "practise" is a verb.
American English commonly uses "practice" for both the noun and the verb.
Its and It's
Your and You're
Whose and Who's
Examples: Whose book is this? Who's attending the class?
Then and Than
Fewer and Less
Between and Among
Examples: The competition is between two teams. She distributed the papers among the students.
Some words look almost identical but have different meanings. Focus on the spelling difference and connect each word with a simple example.
| Word | Meaning | Example |
|---|---|---|
| Breath | Air taken into or released from the lungs | Take a deep breath. |
| Breathe | To take air into and release it from the lungs | Try to breathe slowly. |
| Principal | Main; or head of a school or college | The principal announced the results. |
| Principle | A fundamental rule or belief | Fairness is an important principle. |
| Precede | To come before | A short introduction will precede the lecture. |
| Proceed | To continue or move forward | Please proceed to the next question. |
| Stationary | Not moving | The train remained stationary. |
| Stationery | Writing materials | She purchased stationery for the examination. |
| Adapt | To adjust to new conditions | Students must adapt to a new timetable. |
| Adopt | To take up or accept something; also to legally take a child into one's family | The school adopted a new teaching method. |
| Access | The ability or right to enter or use something | Candidates need access to the portal. |
| Excess | An amount greater than necessary or allowed | Excess sugar may be harmful. |
When you encounter a confusing-word question, follow a systematic process rather than selecting an answer based only on how it sounds.
Example: The new timetable had a positive _____ on attendance.
Options: (A) affect (B) effect (C) except (D) advice
Correct answer: Effect. The sentence requires a noun meaning "result".
Use the following revision plan to build accuracy and retain confusing words for longer.
Learn both words at the same time. For example, write "accept = receive" and "except = excluding" on the same revision card.
Create one short sentence for each word. Using a word in your own sentence helps you understand how it works.
Study a manageable number of word pairs daily. Review them the next day and return to difficult pairs after a few days.
Once you understand the meanings, solve mixed MCQs without looking at your notes. This helps you distinguish words when they appear in unfamiliar contexts.
Record the questions you answer incorrectly, the correct word and the reason your original choice was wrong. Revisit this notebook regularly.
Practise confusing words alongside subject-verb agreement, tenses, prepositions, articles and sentence improvement. This develops both vocabulary knowledge and grammatical accuracy.
Choose the most appropriate word to complete each sentence. Try all questions before checking the answer key.
Q1. The heavy rain may _____ the match schedule.
Q2. Everyone attended the meeting _____ Rahul.
Q3. My teacher gave me useful _____ before the examination.
Q4. The school _____ addressed the students.
Q5. Please do not _____ your admit card.
Q6. This is the best book I have read _____ far.
Q7. The car remained _____ near the gate.
Q8. I am not sure _____ the application has been submitted.
Q9. The new software had a positive _____ on productivity.
Q10. The blue curtains _____ the colour of the walls.
Q11. _____ going to be an important examination year for many candidates.
Q12. The students completed the test and _____ reviewed their answers.
Q13. The teacher asked us to take a deep _____ before starting the exercise.
Q14. The candidate is _____ for the scholarship because she meets the requirements.
Q15. Of tea and coffee, I prefer the _____.
Confusing words become easier to master when you understand their meanings, grammatical roles and usage in complete sentences. Focus on frequently confused pairs, practise them in context and review your mistakes regularly.
For SSC CGL 2027, combine vocabulary revision with grammar exercises, reading comprehension and timed MCQs. A consistent routine can help you improve accuracy and become more confident when answering English questions.
Keep learning with Katara Academy and strengthen your English preparation for SSC CGL 2027.
Idioms and phrases are an important part of English vocabulary preparation for SSC CGL 2027. These expressions often have meanings that cannot be understood by interpreting each word literally. Learning their meanings, usage and context can help candidates answer vocabulary questions more accurately.
A smart revision strategy is more effective than memorising hundreds of expressions in one sitting. In this guide, you will learn how to revise idioms and phrases, understand commonly used expressions, practise them in sentences and test your preparation through multiple-choice questions.
An idiom is a fixed expression whose meaning is different from the literal meanings of its individual words. A phrase is a group of words that conveys an idea or meaning. In competitive-exam vocabulary, idioms and phrases are often tested by asking candidates to identify the meaning of an expression or select its correct usage.
Example: "Once in a blue moon" means something that happens very rarely.
Example in a sentence: We visit that restaurant once in a blue moon.
Here, the expression does not refer to the literal appearance of the Moon. It describes an event that happens infrequently.
The exact questions asked in SSC CGL 2027 cannot be predicted. Therefore, focus on understanding a broad range of commonly used expressions and practise according to the latest official examination pattern.
Start your revision with the following frequently used expressions. Learn the meaning and read the example sentence to understand how each idiom works in context.
| Idiom or Phrase | Meaning | Example Sentence |
|---|---|---|
| Once in a blue moon | Very rarely | He eats fast food once in a blue moon. |
| A piece of cake | Something very easy | The first exercise was a piece of cake. |
| Break the ice | To make people feel comfortable at the beginning of an interaction | The teacher told a joke to break the ice. |
| Hit the nail on the head | To describe something exactly right | Your explanation hit the nail on the head. |
| Spill the beans | To reveal a secret | Rohan spilled the beans about the surprise party. |
| Burn the midnight oil | To work or study late into the night | She burned the midnight oil before the examination. |
| At the eleventh hour | At the last possible moment | They submitted the application at the eleventh hour. |
| Beat around the bush | To avoid discussing the main point | Please stop beating around the bush and answer directly. |
| Under the weather | Feeling unwell | I stayed home because I was feeling under the weather. |
| In hot water | In trouble | He was in hot water after missing the deadline. |
| Cost an arm and a leg | To be extremely expensive | That luxury watch costs an arm and a leg. |
| Call it a day | To stop working for the day | We finished the revision and decided to call it a day. |
| Keep an eye on | To watch carefully | Keep an eye on the clock during the test. |
| By leaps and bounds | Very quickly or significantly | Her English skills improved by leaps and bounds. |
| Make both ends meet | To manage expenses with available income | The family works hard to make both ends meet. |
| Through thick and thin | In good and bad circumstances | True friends support each other through thick and thin. |
| A blessing in disguise | Something that seems bad initially but turns out beneficial | Missing that train was a blessing in disguise. |
| Burn one's bridges | To destroy relationships or future opportunities | Think carefully before you burn your bridges. |
| Turn a blind eye | To deliberately ignore something | The supervisor refused to turn a blind eye to cheating. |
| Get cold feet | To become nervous and hesitate | He got cold feet just before the interview. |
Grouping expressions by their meaning can make revision easier. Instead of memorising a random list, learn related idioms together.
A structured revision routine can help you remember idioms for longer. Use the following method during your English preparation.
Begin with 10 to 15 expressions per study session. Focus on their meanings and usage before moving to a larger list. Consistent learning is more useful than trying to memorise too many expressions at once.
Create four columns: idiom, meaning, example sentence and revision status. Record unfamiliar expressions and mark those you repeatedly forget.
Revise new idioms on the same day, the next day and again after a few days. Revisit difficult expressions more frequently than the ones you already remember.
Do not learn only the dictionary meaning. Read the complete sentence and understand how the expression affects its meaning. This is particularly useful when two answer options seem similar.
Once you have revised a group of expressions, attempt a short MCQ quiz without looking at your notes. Review every incorrect answer and write the correct meaning again.
Keep a separate list of idioms you confuse with one another. Revise this list before attempting another quiz so that the same errors become less frequent.
Choose the most appropriate meaning of each idiom. Attempt all questions before checking the answer key.
Q1. What does "once in a blue moon" mean?
Q2. The idiom "a piece of cake" refers to something that is:
Q3. What does "spill the beans" mean?
Q4. If someone is "under the weather", they are:
Q5. "At the eleventh hour" means:
Q6. What does "beat around the bush" mean?
Q7. "Leave no stone unturned" means:
Q8. If someone "gets cold feet", they:
Q9. What does "turn a blind eye" mean?
Q10. "Back to square one" means:
Q11. What does "hit the nail on the head" mean?
Q12. "The ball is in your court" means:
Q13. What does "burn the midnight oil" mean?
Q14. "Cost an arm and a leg" means:
Q15. What does "read between the lines" mean?
Idioms and phrases preparation for SSC CGL 2027 becomes more manageable when you learn expressions in context, revise them regularly and test your understanding through MCQs. Focus on the meaning of each idiom, practise using it in a sentence and review the expressions you find difficult.
Include vocabulary revision in your daily English study routine. Combine idioms and phrases with synonyms, antonyms, one-word substitutions, grammar and reading comprehension to develop balanced preparation for the examination.
Keep practising with Katara Academy and strengthen your English vocabulary for SSC CGL 2027.
One-word substitution is an important vocabulary topic for candidates preparing for SSC CGL 2027 and other competitive examinations. These questions test your ability to replace a phrase or a group of words with one word that expresses the same meaning. A strong vocabulary helps you solve these questions accurately and also improves your performance in sentence completion, reading comprehension and other English sections.
In this article, you will learn commonly used one-word substitutions, their meanings, examples and practice questions with answers. Revise these words regularly and focus on understanding their meanings instead of memorising them without context.
One-word substitution means replacing a phrase with a single word that conveys the same meaning. Competitive examinations often present a definition or description and ask you to select the most suitable word.
Example: A person who cannot read or write is called an illiterate person.
Here, the phrase "a person who cannot read or write" is replaced by the word "illiterate". Similarly, a person who speaks many languages is called a polyglot.
To answer these questions correctly, identify the key meaning of the phrase, distinguish similar words and check whether the word refers to a person, place, action, quality or concept.
The following words describe people according to their habits, abilities, interests or roles. These are useful for English vocabulary revision.
| Phrase | One-Word Substitution | Example |
|---|---|---|
| A person who cannot read or write | Illiterate | The programme helps illiterate adults learn basic reading skills. |
| A person who speaks many languages | Polyglot | The polyglot can communicate in several languages. |
| A person who loves books | Bibliophile | As a bibliophile, she enjoys collecting novels. |
| A person who hates mankind | Misanthrope | The character is portrayed as a misanthrope. |
| A person who loves mankind | Philanthropist | The philanthropist donated money to support education. |
| A person who looks at the bright side of things | Optimist | An optimist believes that the situation can improve. |
| A person who expects negative outcomes | Pessimist | The pessimist expected the plan to fail. |
| A person who doubts accepted beliefs | Sceptic | The sceptic asked for evidence before accepting the claim. |
| A person who eats too much | Glutton | The story describes a glutton who never feels satisfied. |
| A person who is new to a subject or activity | Novice | The novice needed guidance during the training. |
| A person who is highly skilled in an activity | Expert | The expert explained the difficult concept clearly. |
| A person who offers services without payment | Volunteer | The volunteer helped organise the event. |
Questions about places frequently appear in vocabulary exercises. Learn the differences between the following terms carefully.
| Phrase | One-Word Substitution |
|---|---|
| A place where books are kept for reading or borrowing | Library |
| A place where birds are kept | Aviary |
| A place where bees are kept | Apiary |
| A place where fish are kept | Aquarium |
| A place where weapons are stored | Arsenal |
| A place where coins are made | Mint |
| A place where dead bodies are buried | Cemetery |
| A place where monks live | Monastery |
| A place where orphans live and receive care | Orphanage |
| A place where aircraft are kept and maintained | Hangar |
| A place where historical objects are displayed | Museum |
| A place where astronomical objects are observed | Observatory |
Revision tip: Remember words in related groups. For example, an aviary is associated with birds, an apiary with bees and an aquarium with aquatic life. Grouping vocabulary by topic makes recall easier.
These terms describe systems of government, social structures and political concepts. Learn the exact meaning of each word because several terms may appear similar.
| Phrase | One-Word Substitution | Meaning |
|---|---|---|
| Government by the people | Democracy | A system in which people exercise political power directly or through representatives. |
| Government by a king or queen | Monarchy | A system in which the head of state is a monarch. |
| Government by a small group of people | Oligarchy | Power is held by a small group. |
| Government by one person with absolute power | Autocracy | Supreme authority is concentrated in one ruler. |
| A person who works for the welfare of humanity | Humanitarian | A person concerned with human welfare. |
| A person who believes in equal rights for women | Feminist | A person who supports gender equality. |
| A person who works for the abolition of slavery | Abolitionist | A person who campaigns to end a practice or institution, especially slavery. |
| A person who loves and serves their country | Patriot | A person who demonstrates love and commitment to their country. |
| A person who betrays their country | Traitor | A person who betrays their country or a cause. |
| A person who believes in no government | Anarchist | A person who advocates or supports the absence of government. |
Words related to books, writing and language are commonly useful in vocabulary preparation. Pay attention to the difference between a person who writes a work and the type of work itself.
| Phrase | One-Word Substitution |
|---|---|
| A person who writes books | Author |
| A person who writes poems | Poet |
| A person who writes plays | Playwright |
| A person who compiles a dictionary | Lexicographer |
| A person who writes using another person's name | Pseudonymous writer |
| A short account of a person's life written by another person | Biography |
| The story of a person's life written by that person | Autobiography |
| A book or document written by hand | Manuscript |
| A list of books or sources referred to in a work | Bibliography |
| A speech delivered without preparation | Impromptu |
| A word or phrase that reads the same forwards and backwards | Palindrome |
| The art of beautiful handwriting | Calligraphy |
These words describe personality traits, habits, behaviour or ways of thinking. Understanding the meaning of each term will help you avoid confusing similar options.
| Phrase | One-Word Substitution |
|---|---|
| One who knows everything | Omniscient |
| One who is present everywhere | Omnipresent |
| One who has unlimited power | Omnipotent |
| One who is difficult to please | Fastidious |
| One who spends money carelessly | Spendthrift |
| One who spends very little money | Miser |
| One who is unable to pay debts | Insolvent |
| One who is easily deceived | Gullible |
| One who speaks very little | Taciturn |
| One who talks excessively | Garrulous |
| One who is not easily upset or excited | Phlegmatic |
| One who cannot be corrected or reformed | Incorrigible |
Science and nature vocabulary can also appear in competitive examinations. Revise these definitions to strengthen your understanding of specialised terms.
| Phrase | One-Word Substitution |
|---|---|
| The study of birds | Ornithology |
| The study of insects | Entomology |
| The study of plants | Botany |
| The study of animals | Zoology |
| The study of the Earth and its physical features | Geography |
| The study of fossils and ancient life | Palaeontology |
| The scientific study of earthquakes | Seismology |
| The study of stars, planets and other celestial objects | Astronomy |
| An animal that eats only plants | Herbivore |
| An animal that eats other animals | Carnivore |
| An animal that eats both plants and animals | Omnivore |
| An animal that is active mainly at night | Nocturnal |
The following words are useful for quick revision and general competitive-exam vocabulary.
| Phrase | One-Word Substitution |
|---|---|
| Something that cannot be avoided | Inevitable |
| Something that cannot be heard | Inaudible |
| Something that cannot be seen | Invisible |
| Something that cannot be read | Illegible |
| Something that cannot be understood | Incomprehensible |
| Something that cannot be corrected | Irreparable |
| Something that lasts for a very short time | Ephemeral |
| Something that happens once every year | Annual |
| Something that happens once every two years | Biennial |
| Something that happens every two weeks | Fortnightly |
| A statement that appears contradictory but may be true | Paradox |
| A person or thing that causes trouble or difficulty | Nuisance |
Memorising a long vocabulary list in one sitting is rarely effective. Use a planned revision method to improve recall and accuracy.
Remember that one-word substitution is only one part of English preparation. Combine it with synonyms, antonyms, idioms and phrases, spelling, grammar and reading comprehension for balanced practice.
Choose the most appropriate word for each phrase. Try answering all questions before checking the explanations.
Q1. A person who loves books is called a:
Q2. A place where bees are kept is called an:
Q3. The study of insects is known as:
Q4. A person who speaks many languages is a:
Q5. A person who spends money carelessly is called a:
Q6. A word that reads the same forwards and backwards is a:
Q7. A person who expects favourable outcomes is an:
Q8. Something that cannot be avoided is:
Q9. The story of a person's life written by that person is an:
Q10. A person who talks excessively is described as:
Q11. A place where coins are made is called a:
Q12. A person who is easily deceived is:
Q13. Government by the people is called:
Q14. The study of birds is known as:
Q15. Something that lasts for a very short time is:
One-word substitutions can become a scoring area in SSC CGL 2027 when you understand definitions, revise vocabulary regularly and practise questions consistently. Begin with common words, learn them in meaningful groups and gradually move to less familiar terms.
Review the practice questions in this article, note the words you missed and revise them again. Regular vocabulary practice, along with grammar and reading comprehension, will help you build stronger English skills for competitive examinations.
Keep learning with Katara Academy and continue your SSC CGL 2027 English preparation with consistent practice.
Direct and indirect speech is an important topic in English Grammar for SSC CGL 2027. Questions based on narration test your understanding of tense changes, pronouns, reporting verbs, time expressions and sentence structure. Regular practice can help you identify the correct transformation and avoid common grammatical errors.
In direct speech, the exact words spoken by a person are written inside quotation marks. In indirect speech, the speaker's message is reported without quoting the exact words. This article explains the essential rules, solved examples and practice questions to help you prepare for the SSC CGL English section.
Direct Speech: The exact words of the speaker are reported within quotation marks.
Example: Rahul said, "I am preparing for the examination."
Indirect Speech: The speaker's words are reported without quotation marks, with necessary changes to grammar and sentence structure.
Example: Rahul said that he was preparing for the examination.
While converting direct speech into indirect speech, check the reporting verb, tense, pronouns, time expressions and type of sentence. Not every sentence requires a tense change; the correct transformation depends on the context and reporting verb.
When the reporting verb is in the past tense, the tense of the reported speech generally moves one step back, provided the context requires backshifting.
| Direct Speech | Indirect Speech |
|---|---|
| Simple Present | Simple Past |
| Present Continuous | Past Continuous |
| Present Perfect | Past Perfect |
| Present Perfect Continuous | Past Perfect Continuous |
| Simple Past | Past Perfect |
| Past Continuous | Past Perfect Continuous |
| Will | Would |
| Can | Could |
| May | Might |
| Shall | Should or would, depending on meaning |
Examples:
Important exception: Universal truths, scientific facts and statements that remain true generally retain their present tense.
Direct: The teacher said, "The Earth revolves around the Sun."
Indirect: The teacher said that the Earth revolves around the Sun.
When the reporting verb is in the present or future tense, a tense change is generally not required.
Example: She says, "I am tired." → She says that she is tired.
Pronouns change according to the person speaking, the person being addressed and the person being discussed. A useful rule is to identify who "I", "you" and "we" refer to before transforming the sentence.
Examples:
Always check the actual speaker and listener. Pronouns should not be changed mechanically without considering the meaning of the sentence.
Words referring to time and place may change when the reporting situation has shifted to another time or location. The following are common examination patterns:
| Direct Speech | Possible Indirect Form |
|---|---|
| Now | Then |
| Today | That day |
| Yesterday | The previous day |
| Tomorrow | The next day |
| Last night | The previous night |
| Next week | The following week |
| Here | There |
| This | That |
| These | Those |
| Ago | Before |
Example: Direct: He said, "I will visit you tomorrow."
Indirect: He said that he would visit me the next day.
These changes depend on context. If the original time or place reference is still accurate, it may not need to change.
Assertive sentences make statements or express facts and opinions. When converting them into indirect speech:
Examples:
Remember: "Told" normally requires a listener or object, as in "She told me that she was ready." Avoid writing "She told that she was ready" in standard examination grammar.
Interrogative sentences ask questions. Their indirect form depends on whether the question can be answered with yes or no or begins with a question word such as what, where, when, why or how.
Use "if" or "whether" after reporting verbs such as asked or inquired. Change the question structure into statement word order and remove the question mark in the reported clause.
Direct: He said to me, "Are you ready?"
Indirect: He asked me if I was ready.
Direct: She said to him, "Have you finished the work?"
Indirect: She asked him whether he had finished the work.
Retain the question word and use statement word order. Do not add "if" or "whether" when the question word already introduces the reported question.
Direct: The teacher said to me, "Why are you late?"
Indirect: The teacher asked me why I was late.
Direct: He said to her, "Where do you live?"
Indirect: He asked her where she lived.
Exam tip: Avoid auxiliary inversion in indirect questions. Write "He asked where I was going," not "He asked where was I going."
Imperative sentences express commands, requests, instructions, advice or warnings. The reporting verb should reflect the speaker's intention.
Use the structure reporting verb + object + to-infinitive. For negative instructions, use "not to" before the verb.
Examples:
Exclamatory sentences express strong feelings such as happiness, sorrow, surprise or admiration. Common expressions include "Hurrah!", "Alas!", "What a..." and "How...".
When converting these sentences, use a suitable reporting verb such as exclaimed with joy, exclaimed with sorrow or exclaimed with surprise. Convert the exclamation into a statement while preserving its meaning.
Examples:
Example 1: Simple Present Tense
Direct: Priya said, "I like English grammar."
Indirect: Priya said that she liked English grammar.
Explanation: The reporting verb is in the past tense, so "like" generally changes to "liked".
Example 2: Present Perfect Tense
Direct: He said, "I have completed the assignment."
Indirect: He said that he had completed the assignment.
Explanation: Present perfect changes to past perfect when backshifting is required.
Example 3: Yes/No Question
Direct: She said to me, "Can you solve this question?"
Indirect: She asked me if I could solve that question.
Explanation: "Can" changes to "could", "this" changes to "that" when context requires it, and "if" introduces the reported question.
Example 4: WH-Question
Direct: The examiner said to the candidate, "When will you submit the form?"
Indirect: The examiner asked the candidate when they would submit the form.
Explanation: The question word "when" is retained, and "will" changes to "would".
Example 5: Request
Direct: Rahul said to me, "Please lend me your pen."
Indirect: Rahul requested me to lend him my pen.
Explanation: "Please" indicates a request, so "requested" is suitable. Pronouns change according to the speaker and listener.
Example 6: Universal Truth
Direct: The teacher said, "Water boils at 100°C at standard atmospheric pressure."
Indirect: The teacher said that water boils at 100°C at standard atmospheric pressure.
Explanation: A general scientific fact normally remains in the present tense.
Choose the correct indirect form of each sentence. Try to solve all questions before checking the answer key.
Q1. He said, "I am preparing for SSC CGL."
Q2. Riya said, "I have finished my homework."
Q3. The teacher said to me, "Why are you laughing?"
Q4. He said to me, "Do you know the answer?"
Q5. Mother said to me, "Do not waste your time."
Q6. The captain said, "We will win the match."
Q7. She said, "What a wonderful performance!"
Q8. The doctor said to him, "Take your medicine regularly."
Q9. The teacher said, "The Earth revolves around the Sun."
Q10. He said to her, "Where do you live?"
Direct and indirect speech is easier to master when you understand the rules instead of memorising isolated answers. Focus on tense changes, pronoun references, time expressions, interrogative structures, imperatives and exclamations. Practise a few transformations every day and review the mistakes you make.
For SSC CGL 2027, combine grammar practice with vocabulary, error spotting, sentence improvement and reading comprehension. Consistent revision and timed MCQ practice can help improve accuracy in the English section.
Keep practising with Katara Academy and strengthen your English Grammar preparation for SSC CGL 2027.
Active and Passive Voice is an important topic in English grammar for SSC CGL 2027. Questions on voice transformation test your understanding of sentence structure, tenses, helping verbs and the relationship between the subject and the object. Learning the rules of active and passive voice can help you solve grammar questions more accurately in SSC CGL Tier 1 and Tier 2.
In this article, you will learn the basic concepts, tense-wise transformation rules, important examples, common mistakes and practice MCQs with answers for SSC CGL 2027 English preparation.
In active voice, the subject performs the action expressed by the verb. The sentence focuses on the person or thing doing the action.
Structure: Subject + Verb + Object
Examples:
In these sentences, Riya, the teacher and the police perform the actions.
In passive voice, the sentence focuses on the person or thing receiving the action. The object of an active sentence generally becomes the subject of the passive sentence.
Basic Structure: Object + appropriate form of be + Past Participle (V3) + by + Agent
Examples:
The agent introduced by by can be omitted when it is unknown, unimportant or obvious from the context.
Understanding tense patterns is essential for solving voice transformation questions. Study the following structures and examples.
Active: Subject + V1/V1-s or es + Object
Passive: Object + am/is/are + V3
Active: She cleans the room.
Passive: The room is cleaned by her.
Active: Subject + am/is/are + V-ing + Object
Passive: Object + am/is/are + being + V3
Active: They are repairing the road.
Passive: The road is being repaired by them.
Active: Subject + has/have + V3 + Object
Passive: Object + has/have + been + V3
Active: He has completed the project.
Passive: The project has been completed by him.
Active: Subject + V2 + Object
Passive: Object + was/were + V3
Active: The manager approved the proposal.
Passive: The proposal was approved by the manager.
Active: Subject + was/were + V-ing + Object
Passive: Object + was/were + being + V3
Active: The workers were painting the wall.
Passive: The wall was being painted by the workers.
Active: Subject + had + V3 + Object
Passive: Object + had + been + V3
Active: She had submitted the form.
Passive: The form had been submitted by her.
Active: Subject + will + V1 + Object
Passive: Object + will + be + V3
Active: The company will launch the product.
Passive: The product will be launched by the company.
Active: Subject + will have + V3 + Object
Passive: Object + will have been + V3
Active: They will have completed the work by Monday.
Passive: The work will have been completed by Monday.
Important note: Continuous perfect forms and future continuous forms can produce lengthy passive constructions and are generally less common in basic exam exercises. Focus first on the standard patterns above and follow the exact sentence given in the question.
Modal verbs include can, could, may, might, must, should and ought to. When converting a sentence containing a modal verb into passive voice, use modal + be + V3.
Structure: Object + Modal + be + V3
Examples:
Common mistake: Do not use V2 after a modal verb in a passive construction. The correct structure is modal + be + V3.
When changing a question into passive voice, retain the interrogative meaning and use the correct helping verb at the beginning of the sentence.
Examples:
Active: Does she write letters?
Passive: Are letters written by her?
Active: Did the police arrest the suspect?
Passive: Was the suspect arrested by the police?
Active: Has he completed the task?
Passive: Has the task been completed by him?
Active: Who wrote this poem?
Passive: By whom was this poem written?
Active: When will they announce the results?
Passive: When will the results be announced?
For questions beginning with who, what, when, why or how, preserve the original question word and construct the rest of the passive sentence correctly.
Imperative sentences express commands, requests, advice or instructions. In many exam-style transformations, an imperative sentence can be changed using let + object + be + V3.
Examples:
Polite requests may also be expressed using structures such as You are requested to follow the instructions, depending on the original sentence and the options provided.
Passive voice generally requires a verb that takes an object. Intransitive verbs, which do not take a direct object, usually cannot be converted into passive voice.
Examples:
These sentences do not have direct objects that can become the subjects of passive constructions.
Exam Tip: Before changing a sentence into passive voice, check whether the verb has an object. Do not force a passive construction where one is not grammatically possible.
Choose the correct passive voice form for each active sentence.
Question 1: The teacher explains the lesson.
Question 2: They are building a new bridge.
Question 3: The police arrested the thief.
Question 4: She has completed the assignment.
Question 5: You must obey the instructions.
Question 6: Did he write this letter?
Question 7: The workers were repairing the road.
Question 8: The company will announce the results tomorrow.
Question 9: Open the window.
Question 10: The baby sleeps peacefully.
1. B) The lesson is explained by the teacher.
The active sentence is in the simple present tense. The passive structure is is + V3.
2. C) A new bridge is being built by them.
The active sentence is in the present continuous tense. Use is being + V3 in the passive voice.
3. B) The thief was arrested by the police.
The active sentence is in the simple past tense. Use was + V3 for the singular subject thief.
4. A) The assignment has been completed by her.
The active sentence is in the present perfect tense. Use has been + V3.
5. B) The instructions must be obeyed by you.
With a modal verb, the passive structure is modal + be + V3.
6. B) Was this letter written by him?
The active question is in the simple past tense. The passive question begins with was, followed by the subject and V3.
7. C) The road was being repaired by the workers.
The active sentence is in the past continuous tense. Use was being + V3.
8. B) The results will be announced by the company tomorrow.
The simple future passive structure is will + be + V3.
9. B) Let the window be opened.
This is a standard exam-style passive transformation of an imperative sentence.
10. C) The sentence cannot normally be changed into passive voice.
The verb sleeps is intransitive in this sentence and does not take a direct object.
Active and Passive Voice is a useful grammar topic for SSC CGL 2027 English preparation. Understanding tense-wise structures, modal verbs, interrogative transformations and imperative sentences can help candidates solve voice questions accurately.
Revise the rules regularly and practise a variety of sentence transformations to improve your confidence in SSC CGL Tier 1 and Tier 2.
Tense-based error spotting is an important part of English grammar preparation for SSC CGL 2027. These questions test your ability to identify incorrect verb forms, understand the sequence of events and choose the appropriate tense according to the context of a sentence.
Many candidates lose marks because they confuse simple past with present perfect, use the wrong verb form after helping verbs, or fail to maintain tense consistency. Learning the basic rules and practising common error patterns can help you improve accuracy in SSC CGL Tier 1 and Tier 2 English.
In this article, you will learn important tense rules, common mistakes, solved examples, exam shortcuts and practice MCQs with answers.
English grammar commonly classifies tenses into present, past and future, with four forms associated with each time category.
For error spotting, focus on the time expressions, the relationship between actions and the correct structure of the verb.
The simple present tense is used for habits, routines, general truths and repeated actions. With third-person singular subjects such as he, she and it, the main verb generally takes -s or -es.
Structure:
Incorrect: He go to the library every evening.
Correct: He goes to the library every evening.
Incorrect: The sun rise in the east.
Correct: The sun rises in the east.
Example: Identify the error: She do not understand the question.
Correction: She does not understand the question.
Remember that after does or does not, the main verb takes its base form.
The present continuous tense describes an action happening now or around the present time. It uses am, is or are followed by the -ing form of the verb.
Structure: Subject + am/is/are + verb-ing
Incorrect: They is preparing for the examination.
Correct: They are preparing for the examination.
Incorrect: I am study for my test.
Correct: I am studying for my test.
Some verbs that describe states, such as know, believe and understand, are not normally used in continuous forms when they express their usual meanings.
Incorrect: I am knowing the answer.
Correct: I know the answer.
The simple past tense describes completed actions in the past. Regular verbs generally take -ed, while irregular verbs have their own past forms.
Common time expressions: yesterday, last week, two days ago and in 2024.
Incorrect: She did not attended the meeting yesterday.
Correct: She did not attend the meeting yesterday.
Incorrect: He has visited Jaipur last year.
Correct: He visited Jaipur last year.
When did or did not is used, the main verb must be in its base form. A specific, completed past-time expression generally requires the simple past rather than the present perfect.
The present perfect tense connects a past action with the present. It is commonly used for experiences, recent actions and situations that continue into the present.
Structure: Subject + has/have + past participle (V3)
Incorrect: She have completed the assignment.
Correct: She has completed the assignment.
Incorrect: I have saw this movie before.
Correct: I have seen this movie before.
Important distinction:
Do not normally use the present perfect with a finished past-time expression such as yesterday or last year.
The past perfect tense describes an action completed before another past action or past reference point.
Structure: Subject + had + past participle (V3)
Incorrect: The train had left before we reach the station.
Correct: The train had left before we reached the station.
Example: When I arrived at the office, the meeting had already started.
The past perfect helps establish which of two past events happened first. It is not necessary in every sentence containing two past actions; use it when the sequence needs to be made clear.
In many future-time clauses beginning with when, before, after, until, as soon as and if, the simple present is used to refer to a future event.
Incorrect: I will call you when I will reach home.
Correct: I will call you when I reach home.
Incorrect: If it will rain tomorrow, we will stay indoors.
Correct: If it rains tomorrow, we will stay indoors.
The main clause can use will, but the time or condition clause generally uses the simple present when referring to a likely future event.
Since identifies the starting point of an action or situation, while for indicates its duration.
For an action that began in the past and continues now, the present perfect or present perfect continuous is often appropriate.
Incorrect: She is working here since 2022.
Correct: She has been working here since 2022.
Incorrect: I have been waiting since two hours.
Correct: I have been waiting for two hours.
When a sentence describes events in the same time frame, the tense should remain consistent unless the meaning requires a change. A tense change is appropriate when the sentence moves between different time periods.
Incorrect: He entered the room and switches on the light.
Correct: He entered the room and switched on the light.
Incorrect: She studied hard and passes the examination last year.
Correct: She studied hard and passed the examination last year.
However, a sentence can correctly use different tenses when the actions belong to different time periods.
Example: She works in Pune now, but she lived in Mumbai last year.
Modal verbs such as can, could, may, might, must, should and will are followed by the base form of the main verb.
Incorrect: He can speaks English fluently.
Correct: He can speak English fluently.
Incorrect: You should to follow the instructions.
Correct: You should follow the instructions.
For past possibility or completed actions, modal structures may use have followed by the past participle.
Example: She should have informed the teacher earlier.
Identify the part of each sentence that contains a grammatical error. Choose option D if the sentence has no error.
Question 1: She do not (A) / understand the instructions (B) / given by the teacher (C) / No error (D).
Question 2: He has completed the assignment (A) / yesterday evening (B) / before leaving the office (C) / No error (D).
Question 3: When she will arrive (A) / at the station (B) / we will receive her (C) / No error (D).
Question 4: They have been waiting (A) / for two hours (B) / outside the examination hall (C) / No error (D).
Question 5: The train had left (A) / before we reach (B) / the railway station (C) / No error (D).
Question 6: She can speaks (A) / three languages fluently (B) / without any difficulty (C) / No error (D).
Question 7: I have known him (A) / for five years (B) / and we are good friends (C) / No error (D).
Question 8: He did not attend (A) / the meeting yesterday (B) / because he was ill (C) / No error (D).
Question 9: If it will rain tomorrow (A) / the match will be cancelled (B) / by the organisers (C) / No error (D).
Question 10: By next month (A) / she will have completed (B) / her training programme (C) / No error (D).
1. A) She do not
Correct sentence: She does not understand the instructions given by the teacher. The singular subject she takes does not.
2. A) He has completed the assignment
Correct sentence: He completed the assignment yesterday evening before leaving the office. A specific completed past-time expression generally takes the simple past.
3. A) When she will arrive
Correct sentence: When she arrives at the station, we will receive her. Use the simple present in this future-time clause.
4. D) No error
The present perfect continuous correctly describes an action that started in the past and continues now. For two hours expresses duration.
5. B) before we reach
Correct sentence: The train had left before we reached the railway station. The second action is also placed in the past.
6. A) She can speaks
Correct sentence: She can speak three languages fluently. A modal verb is followed by the base form of the main verb.
7. D) No error
Have known is the correct present perfect form of know. For five years indicates duration, and the sentence is grammatically correct.
8. D) No error
Did not is correctly followed by the base verb attend. The sentence consistently refers to a past event.
9. A) If it will rain tomorrow
Correct sentence: If it rains tomorrow, the match will be cancelled by the organisers. Use the simple present in this future condition clause.
10. D) No error
Will have completed is the correct future perfect structure for an action expected to be completed before a future deadline.
Tense-based error spotting is a valuable topic for SSC CGL 2027 English preparation. Understanding verb forms, time expressions, tense consistency and the use of helping verbs can help candidates identify grammatical errors more accurately.
Revise these rules regularly and practise a variety of questions to improve your performance in SSC CGL Tier 1 and Tier 2 English.
Subject-Verb Agreement is an important grammar topic for candidates preparing for SSC CGL 2027. Error spotting questions often test whether the subject and verb agree in number and person. A small grammatical mistake can change the correctness of an entire sentence, so understanding these rules is essential for improving accuracy in the English section.
In this article, you will learn the important rules of subject-verb agreement, common error patterns, solved examples, exam-oriented shortcuts and practice questions with answers for SSC CGL Tier 1 and Tier 2 preparation.
Subject-Verb Agreement means that the verb must agree with its subject in number and person. A singular subject generally takes a singular verb, while a plural subject generally takes a plural verb.
Examples:
In the simple present tense, singular subjects such as he, she and it generally take a verb ending in -s or -es. Plural subjects usually take the base form of the verb.
A singular subject requires a singular verb, whereas a plural subject requires a plural verb. This is one of the most frequently tested rules in error spotting questions.
Examples:
Exam Tip: Identify the main subject before checking the verb. Do not select a verb simply because a nearby noun is singular or plural.
Words or phrases placed between the subject and the verb do not change the number of the subject. Phrases beginning with expressions such as along with, as well as, together with and in addition to usually do not make a singular subject plural.
Examples:
In the second example, the main subject is quality, not products. Therefore, the singular verb is is correct.
Each, every, either and neither generally take singular verbs when used as subjects in standard subject-verb agreement questions.
Examples:
Exam Tip: Do not let a plural noun after of confuse you. In expressions such as each of the students, the subject is each.
When two subjects are connected by either...or or neither...nor, the verb generally agrees with the subject closer to it. This is commonly known as the proximity rule.
Examples:
Whenever possible, maintain parallel structure and avoid unnecessarily complicated sentences in formal writing.
Collective nouns refer to groups, such as team, committee, family, audience and jury. In standard exam grammar, a collective noun generally takes a singular verb when the group is considered a single unit. A plural verb may be used when the members are emphasised as individuals, depending on the variety of English and context.
Examples:
Exam Tip: When the sentence treats the group as one unit, prefer a singular verb.
Indefinite pronouns such as everyone, everybody, someone, somebody, anyone, anybody, no one and nobody generally take singular verbs.
Examples:
However, pronouns such as both, few, many and several generally take plural verbs.
Examples:
Uncountable nouns such as information, advice, furniture, equipment and luggage generally take singular verbs when used as subjects.
Examples:
Expressions of time, money and distance may take singular verbs when they are treated as a single total amount or unit.
Example: Ten kilometres is a long distance to walk.
In sentences beginning with there, the verb agrees with the actual subject that follows it, not with the word there.
Examples:
Exam Tip: Look at the noun immediately following the verb and identify whether it is singular or plural.
Two subjects connected by and generally take a plural verb because they refer to two people or things.
Examples:
However, when two words joined by and refer to one person, one dish or a single concept, a singular verb may be appropriate depending on the meaning.
Example: Bread and butter is my usual breakfast.
Identify the part of each sentence that contains a grammatical error. If the sentence is correct, choose the option indicating no error.
Question 1: Each of the students (A) / have completed (B) / the assignment on time (C) / No error (D).
Question 2: The quality of these products (A) / are better (B) / than expected (C) / No error (D).
Question 3: Neither the teacher nor the students (A) / was present (B) / at the meeting (C) / No error (D).
Question 4: Everyone in the class (A) / have submitted (B) / the required documents (C) / No error (D).
Question 5: The captain, along with his teammates, (A) / are preparing (B) / for the final match (C) / No error (D).
Question 6: There (A) / are a serious problem (B) / with this application (C) / No error (D).
Question 7: The furniture in these rooms (A) / is quite expensive (B) / and difficult to maintain (C) / No error (D).
Question 8: Either the manager or the employees (A) / is responsible (B) / for the delay (C) / No error (D).
Question 9: A number of candidates (A) / has applied (B) / for the available posts (C) / No error (D).
Question 10: Mathematics (A) / is an important subject (B) / for competitive examinations (C) / No error (D).
1. B) have completed
Correct sentence: Each of the students has completed the assignment on time. Each takes a singular verb.
2. B) are better
Correct sentence: The quality of these products is better than expected. The main subject is quality, which is singular.
3. B) was present
Correct sentence: Neither the teacher nor the students were present at the meeting. With neither...nor, the verb agrees with the nearer subject, students.
4. B) have submitted
Correct sentence: Everyone in the class has submitted the required documents. Everyone takes a singular verb.
5. B) are preparing
Correct sentence: The captain, along with his teammates, is preparing for the final match. The phrase along with his teammates does not make the singular subject plural.
6. B) are a serious problem
Correct sentence: There is a serious problem with this application. The actual subject, problem, is singular.
7. D) No error
Furniture is an uncountable noun and takes a singular verb. The sentence is correct.
8. B) is responsible
Correct sentence: Either the manager or the employees are responsible for the delay. The nearer subject, employees, is plural.
9. B) has applied
Correct sentence: A number of candidates have applied for the available posts. The expression a number of takes a plural verb. In contrast, the number of generally takes a singular verb.
10. D) No error
Mathematics is treated as a singular subject when referring to the academic discipline, so the sentence is correct.
Subject-Verb Agreement is a scoring grammar topic for SSC CGL 2027 when its rules are understood clearly. By identifying the main subject, recognising singular and plural expressions, and practising common error patterns, candidates can improve their accuracy in English error spotting questions.
Revise the rules regularly and practise a variety of questions to strengthen your preparation for SSC CGL Tier 1 and Tier 2.
Geometry is an important topic in the Quantitative Aptitude section of SSC CGL 2027. Questions based on triangles and circles test your understanding of angles, sides, theorems, area, circumference and geometric relationships.
Learning important formulas and practising standard question patterns can help candidates solve geometry problems with greater speed and accuracy. This article covers triangle properties, circle theorems, solved examples, shortcuts and practice MCQs for SSC CGL Tier 1 and Tier 2 preparation.
A triangle is a closed geometric figure with three sides, three vertices and three interior angles. Understanding its basic properties is essential for solving geometry questions.
Triangles can be classified according to their sides or angles.
Memorise these formulas for quick calculations in SSC CGL geometry questions.
Example 1: Two angles of a triangle are 55° and 65°. Find the third angle.
Solution:
Sum of angles = 180°
Third angle = 180° − (55° + 65°)
= 180° − 120°
Answer: 60°
Example 2: A right-angled triangle has sides of 6 cm and 8 cm forming the right angle. Find the hypotenuse.
Solution:
Hypotenuse² = 6² + 8²
= 36 + 64 = 100
Hypotenuse = √100
Answer: 10 cm
Triangle similarity and congruence are useful concepts in geometry problems involving corresponding sides and angles.
Similar triangles: Two triangles are similar when their corresponding angles are equal and their corresponding sides are proportional.
Congruent triangles: Two triangles are congruent when they have the same shape and size. Their corresponding sides and angles are equal.
Common triangle congruence criteria include:
Example 3: Two similar triangles have corresponding sides in the ratio 2:3. If the smaller triangle has an area of 24 cm², find the area of the larger triangle.
Solution:
Ratio of areas = Square of the ratio of corresponding sides
Area ratio = 2²:3² = 4:9
Area of larger triangle = 24 × 9/4
Answer: 54 cm²
A circle is a closed curve in which every point on the circumference is at the same distance from the centre.
Here, r represents the radius and d represents the diameter. Unless specified otherwise, π is commonly taken as 22/7 or 3.14, depending on the question.
Example 4: Find the circumference of a circle with a radius of 7 cm. Use π = 22/7.
Solution:
Circumference = 2πr
= 2 × 22/7 × 7
Answer: 44 cm
Example 5: Find the area of a circle with a radius of 14 cm. Use π = 22/7.
Solution:
Area = πr²
= 22/7 × 14 × 14
Answer: 616 cm²
Circle theorems are frequently useful when solving geometry questions involving angles, chords and tangents.
Example 6: An angle subtended by an arc at the circumference is 35°. Find the angle subtended by the same arc at the centre.
Solution:
Angle at the centre = 2 × Angle at the circumference
= 2 × 35°
Answer: 70°
Example 7: A tangent touches a circle at point P. If O is the centre, what is the angle between OP and the tangent at P?
Solution:
The radius drawn to the point of contact is perpendicular to the tangent.
Answer: 90°
Attempt these multiple-choice questions to test your understanding of triangles and circles.
Question 1: Two angles of a triangle are 48° and 72°. Find the third angle.
Question 2: A right-angled triangle has perpendicular sides of 9 cm and 12 cm. Find the hypotenuse.
Question 3: Find the area of a circle with a radius of 7 cm. Use π = 22/7.
Question 4: An angle at the circumference subtended by an arc is 40°. Find the angle subtended by the same arc at the centre.
Question 5: The radius of a circle is 14 cm. Find its circumference using π = 22/7.
Question 6: The corresponding sides of two similar triangles are in the ratio 3:5. What is the ratio of their areas?
Question 7: What is the angle between a radius and a tangent at the point of contact?
1. B) 60°
Third angle = 180° − (48° + 72°) = 60°.
2. C) 15 cm
Hypotenuse = √(9² + 12²) = √(81 + 144) = √225 = 15 cm.
3. C) 154 cm²
Area = πr² = 22/7 × 7 × 7 = 154 cm².
4. C) 80°
Angle at the centre = 2 × 40° = 80°.
5. C) 88 cm
Circumference = 2πr = 2 × 22/7 × 14 = 88 cm.
6. C) 9:25
The ratio of areas of similar triangles is the square of the ratio of corresponding sides: 3²:5² = 9:25.
7. C) 90°
The radius is perpendicular to the tangent at the point of contact.
Triangles and circles are essential areas of geometry preparation for SSC CGL 2027. A clear understanding of angle properties, triangle formulas, circle measurements and important theorems can make many questions easier to solve.
Revise the formulas regularly, practise the solved examples and attempt MCQs under timed conditions to improve your accuracy and confidence in Quantitative Aptitu
Algebraic Identities and Simplification are important topics in the Quantitative Aptitude section of SSC CGL 2027. These concepts help candidates solve mathematical expressions quickly, reduce lengthy calculations and improve accuracy in competitive examinations.
In SSC CGL, questions may involve algebraic formulas, expansion of expressions, factorisation, squares, cubes and numerical simplification. Learning the standard identities and practising their applications can help you save valuable time during the examination.
This article covers important algebraic identities, solved examples, shortcut methods and practice MCQs for SSC CGL Tier 1 and Tier 2 preparation.
Memorise the following identities and understand when to apply each formula.
Example 1: Find the value of 103² using an algebraic identity.
Solution:
103² = (100 + 3)²
Using (a + b)² = a² + 2ab + b²:
103² = 100² + 2 × 100 × 3 + 3²
= 10,000 + 600 + 9
Answer: 10,609
Example 2: Calculate 98² without lengthy multiplication.
Solution:
98² = (100 − 2)²
= 100² − 2 × 100 × 2 + 2²
= 10,000 − 400 + 4
Answer: 9,604
Example 3: Simplify (x + 5)² − (x − 5)².
Solution:
(x + 5)² = x² + 10x + 25
(x − 5)² = x² − 10x + 25
Subtracting the second expression from the first:
= x² + 10x + 25 − x² + 10x − 25
= 20x
Answer: 20x
Algebraic identities are especially useful when calculating squares of numbers close to 100, 50 or another convenient base.
Example 4: Find 49².
Solution:
49² = (50 − 1)²
= 50² − 2 × 50 × 1 + 1²
= 2,500 − 100 + 1
Answer: 2,401
Example 5: Find 51 × 49.
Solution:
51 × 49 = (50 + 1)(50 − 1)
Using (a + b)(a − b) = a² − b²:
= 50² − 1²
= 2,500 − 1
Answer: 2,499
Factorisation means expressing an algebraic expression as a product of simpler factors. It can help candidates simplify expressions and solve algebra-based questions efficiently.
Example 6: Factorise x² − 81.
Solution:
x² − 81 = x² − 9²
Using a² − b² = (a − b)(a + b):
Answer: (x − 9)(x + 9)
Example 7: Factorise x² + 7x + 12.
Solution:
Find two numbers whose sum is 7 and product is 12.
Those numbers are 3 and 4.
x² + 7x + 12 = x² + 3x + 4x + 12
= x(x + 3) + 4(x + 3)
Answer: (x + 3)(x + 4)
Simplification questions may combine multiple operations, fractions, brackets and algebraic expressions. Follow the correct order of operations and apply identities wherever possible.
Example 8: Simplify (a + b)² − (a − b)².
Solution:
(a + b)² = a² + 2ab + b²
(a − b)² = a² − 2ab + b²
Subtracting:
= a² + 2ab + b² − a² + 2ab − b²
= 4ab
Answer: 4ab
Example 9: If x + 1/x = 5, find x² + 1/x².
Solution:
(x + 1/x)² = x² + 2 + 1/x²
25 = x² + 2 + 1/x²
x² + 1/x² = 25 − 2
Answer: 23
Example 10: If a − b = 4 and ab = 5, find a² + b².
Solution:
(a − b)² = a² − 2ab + b²
16 = a² + b² − 10
a² + b² = 16 + 10
Answer: 26
Cube identities are useful in questions involving larger algebraic expressions and factorisation.
Example 11: Expand (x + 2)³.
Solution:
(x + 2)³ = x³ + 3x²(2) + 3x(2²) + 2³
= x³ + 6x² + 12x + 8
Answer: x³ + 6x² + 12x + 8
Example 12: Factorise x³ − 27.
Solution:
x³ − 27 = x³ − 3³
Using a³ − b³ = (a − b)(a² + ab + b²):
Answer: (x − 3)(x² + 3x + 9)
Try these multiple-choice questions to test your understanding of algebraic identities and simplification.
Question 1: Find the value of 102².
Question 2: Simplify (a + b)² − (a − b)².
Question 3: Factorise x² − 64.
Question 4: If x + 1/x = 4, find x² + 1/x².
Question 5: Expand (x + 3)².
1. B) 10,404
102² = (100 + 2)² = 10,000 + 400 + 4 = 10,404.
2. B) 4ab
Expanding both squares and subtracting gives 4ab.
3. C) (x − 8)(x + 8)
x² − 64 = x² − 8² = (x − 8)(x + 8).
4. B) 14
(x + 1/x)² = x² + 2 + 1/x². Therefore, 16 = x² + 2 + 1/x², so x² + 1/x² = 14.
5. B) x² + 6x + 9
(x + 3)² = x² + 2 × x × 3 + 3² = x² + 6x + 9.
Start by memorising the standard square, cube and factorisation identities. Practise five to ten questions daily and focus on recognising the correct formula before beginning lengthy calculations.
Once you are comfortable with the basic formulas, solve mixed simplification questions under timed conditions. Review your mistakes and practise the identities that cause difficulty.
Algebraic identities and simplification can make many SSC CGL 2027 Quantitative Aptitude questions easier and faster to solve. A strong understanding of squares, cubes, factorisation and algebraic relationships helps improve both calculation speed and accuracy.
Revise the formulas regularly and practise a variety of questions to strengthen your preparation for SSC CGL Tier 1 and Tier 2.
Simple Interest (SI) and Compound Interest (CI) are important topics in the Quantitative Aptitude section of SSC CGL 2027. Questions from these topics test your understanding of interest formulas, principal, rate, time and the growth of money over a given period.
With the right formulas and regular practice, candidates can solve most interest-based questions accurately. This article covers important concepts, shortcuts, solved examples and practice MCQs for SSC CGL Tier 1 and Tier 2 preparation.
Simple Interest is calculated only on the original principal amount. The interest earned in each period remains the same when the principal, rate and time are constant.
Simple Interest Formula:
SI = (P × R × T) / 100
Where:
Amount Formula:
Amount = Principal + Simple Interest
A = P + SI
Example 1: Find the simple interest on ₹5,000 at 8% per annum for 2 years.
Solution:
SI = (P × R × T) / 100
SI = (5000 × 8 × 2) / 100
SI = ₹800
Answer: ₹800
Example 2: A sum of ₹6,000 earns simple interest at 5% per annum for 3 years. Find the total amount.
Solution:
Answer: ₹6,900
SSC CGL questions may ask you to calculate the principal, rate or time when the simple interest is already given.
Principal:
P = (SI × 100) / (R × T)
Rate:
R = (SI × 100) / (P × T)
Time:
T = (SI × 100) / (P × R)
Example 3: A sum of ₹4,000 earns ₹1,200 as simple interest in 5 years. Find the annual rate of interest.
Solution:
R = (1200 × 100) / (4000 × 5)
R = 6%
Answer: 6% per annum
Compound Interest is calculated on the original principal as well as the accumulated interest from previous periods. This means the amount grows over time as interest is added to the balance.
Compound Amount Formula:
A = P(1 + R/100)T
Compound Interest Formula:
CI = A − P
Where:
Example 4: Find the compound interest on ₹10,000 at 10% per annum for 2 years, compounded annually.
Solution:
A = 10000 × (1 + 10/100)2
A = 10000 × 1.1 × 1.1
A = ₹12,100
CI = 12,100 − 10,000 = ₹2,100
Answer: ₹2,100
Example 5: Find the compound interest on ₹8,000 at 5% per annum for 2 years, compounded annually.
Solution:
Amount after 2 years = 8000 × (1.05)2
Amount = ₹8,820
CI = 8,820 − 8,000 = ₹820
Answer: ₹820
Questions asking for the difference between SI and CI over two years are common calculation patterns.
Formula for two years with annual compounding:
CI − SI = P × (R/100)2
This shortcut applies when the principal and annual rate are fixed, the period is exactly two years, and compound interest is compounded annually.
Example 6: Find the difference between simple interest and compound interest on ₹10,000 at 10% per annum for 2 years.
Solution:
Difference = 10000 × (10/100)2
Difference = 10000 × 0.01
Difference = ₹100
Answer: ₹100
Interest may be compounded annually, half-yearly or quarterly. Always check the compounding frequency before applying the formula.
Half-yearly formula:
A = P(1 + R/200)2T
Quarterly formula:
A = P(1 + R/400)4T
Example 7: Find the amount on ₹10,000 at 8% per annum for one year, compounded half-yearly.
Solution:
Answer: ₹10,816 amount and ₹816 compound interest
Try these multiple-choice questions before checking the answers below.
Question 1: Find the simple interest on ₹4,000 at 6% per annum for 3 years.
Question 2: What is the compound interest on ₹5,000 at 10% per annum for 2 years, compounded annually?
Question 3: A sum of ₹8,000 earns ₹1,600 as simple interest in 4 years. Find the annual rate of interest.
Question 4: Find the difference between compound interest and simple interest on ₹20,000 at 5% per annum for 2 years, with annual compounding.
Question 5: Find the amount on ₹4,000 at 10% per annum for 2 years, compounded annually.
1. B) ₹720
SI = (4000 × 6 × 3) / 100 = ₹720.
2. B) ₹1,050
Amount = 5000 × (1.10)2 = ₹6,050. CI = ₹6,050 − ₹5,000 = ₹1,050.
3. B) 5%
R = (1600 × 100) / (8000 × 4) = 5% per annum.
4. B) ₹50
Difference = 20000 × (5/100)2 = ₹50.
5. C) ₹4,840
Amount = 4000 × (1.10)2 = ₹4,840.
Start by memorising the formulas for simple interest and compound interest. Practise basic calculations before attempting questions involving missing values, different compounding periods and the difference between SI and CI.
Use timed practice sessions to improve calculation speed. After every mock test, review incorrect answers and identify whether the error came from formula selection, percentage calculation or misunderstanding the question.
Simple Interest and Compound Interest are manageable topics when you understand their formulas and common question patterns. Focus on principal, rate, time, final amount, compounding frequency and the difference between SI and CI.
Practise these concepts regularly to improve your accuracy and confidence in the SSC CGL 2027 Quantitative Aptitude section.
Time, Speed and Distance is an important topic in the Quantitative Aptitude section of SSC CGL 2027. Questions based on relative speed are commonly solved using a few simple formulas and logical calculations. Understanding the difference between objects moving in the same direction and opposite directions can help candidates solve these questions more quickly and accurately.
In this article, you will learn the important formulas, solved examples, shortcut methods and practice questions on relative speed for SSC CGL Tier 1 and Tier 2 preparation.
Relative speed is the speed of one object with respect to another moving object. It helps us calculate how quickly the distance between two moving objects changes.
Relative speed is mainly used in questions involving two trains, two people running, vehicles travelling on a road, and objects moving towards or away from each other.
When two objects move in the same direction:
Relative Speed = Speed of Faster Object − Speed of Slower Object
When two objects move in opposite directions:
Relative Speed = Speed of First Object + Speed of Second Object
Time taken to meet or overtake:
Time = Distance between Objects ÷ Relative Speed
Unit conversion:
Important: Make sure speed and distance use compatible units before applying a formula. If distance is given in metres, convert speed into metres per second when calculating time in seconds.
When two objects move in the same direction, their relative speed is the difference between their speeds. The faster object catches up with the slower object at this speed.
Example 1: Two cars travel in the same direction at 72 km/h and 54 km/h. If the faster car is 90 metres behind the slower car, how much time will it take to catch up?
Solution:
Answer: 18 seconds
When two objects move towards each other, their relative speed is the sum of their individual speeds. The distance between them decreases at this combined rate.
Example 2: Two cyclists are 300 metres apart and move towards each other at 6 m/s and 4 m/s. Find the time taken for them to meet.
Solution:
Answer: 30 seconds
Relative speed is especially useful in train problems. When two trains cross each other, the total distance covered is generally the sum of their lengths. When one train crosses a stationary pole, the distance covered is the length of that train.
Example 3: Two trains of lengths 120 metres and 180 metres travel in opposite directions at 54 km/h and 36 km/h. Calculate the time taken to cross each other completely.
Solution:
Answer: 12 seconds
Overtaking questions usually involve objects moving in the same direction. The relative speed is the difference between their speeds, while the distance covered to complete the overtake depends on the question.
Example 4: A train 150 metres long travels at 72 km/h and overtakes a train 100 metres long moving in the same direction at 54 km/h. Find the time required to cross the slower train completely.
Solution:
Answer: 50 seconds
Attempt the following multiple-choice questions to test your understanding of relative speed.
Question 1: Two cars travel in the same direction at 80 km/h and 60 km/h. What is their relative speed?
Question 2: Two runners move towards each other at 5 m/s and 7 m/s. They are initially 144 metres apart. How long will they take to meet?
Question 3: A train travelling at 72 km/h overtakes a person walking in the same direction at 6 km/h. If the train is 220 metres long, how much time does it take to pass the person completely?
Question 4: Two trains, each 150 metres long, travel in opposite directions at 45 km/h and 63 km/h. Find the time taken to cross each other.
Question 5: Two bikes are moving in the same direction at 15 m/s and 10 m/s. If the faster bike is 100 metres behind the slower bike, how long will it take to catch up?
1. B) 20 km/h
Same direction: 80 − 60 = 20 km/h.
2. B) 12 seconds
Relative speed = 5 + 7 = 12 m/s. Time = 144 ÷ 12 = 12 seconds.
3. B) 11 seconds
Relative speed = 72 − 6 = 66 km/h. In m/s, 66 × 5/18 = 55/3 m/s. Time = 220 ÷ (55/3) = 12 seconds. Therefore, the correct answer is C) 12 seconds.
4. B) 10 seconds
Total length = 150 + 150 = 300 metres. Relative speed = 45 + 63 = 108 km/h = 30 m/s. Time = 300 ÷ 30 = 10 seconds.
5. C) 20 seconds
Relative speed = 15 − 10 = 5 m/s. Time = 100 ÷ 5 = 20 seconds.
Begin by memorising the formulas for same-direction and opposite-direction movement. Practise unit conversion regularly and solve questions involving meeting time, overtaking and train crossing. Start with basic problems before moving to multi-step questions.
During mock tests, read each question carefully and identify the direction of movement before calculating relative speed. Review incorrect answers to understand whether the mistake occurred in the formula, unit conversion or calculation.
Relative speed is a useful concept for solving Time, Speed and Distance questions in SSC CGL 2027. By understanding when to add or subtract speeds, converting units correctly and practising train and overtaking problems, candidates can improve their speed and accuracy in Quantitative Aptitude.
Revise the formulas regularly and practise a variety of questions to strengthen your SSC CGL Maths preparation.
Time and Work is an important topic in Quantitative Aptitude for SSC CGL preparation. Questions from this chapter commonly involve work efficiency, the time taken by individuals to complete a task, combined work, and comparisons between workers. Learning how to compare efficiency can make many calculations faster and easier.
In this guide, you will learn the basic Time and Work formulas, efficiency comparison methods, shortcut techniques, solved examples, and practice questions with answers. These concepts will help you build a stronger foundation for SSC CGL 2027 Quantitative Aptitude preparation.
Topics covered
Time and Work questions examine how long a person or group takes to complete a task. If a person completes a job in a fixed number of days, we can calculate the fraction of work completed in one day.
For example, if A completes a job in 10 days, A completes one-tenth of the work in one day, assuming a constant working rate.
One-Day Work = Total Work ÷ Number of Days
Time = Total Work ÷ Work Rate
Work = Work Rate × Time
These formulas assume that the working rate remains constant throughout the task.
Efficiency refers to the amount of work completed in a given period. A person who completes the same task in fewer days has a higher work rate and greater efficiency.
If A completes a job in 10 days and B completes the same job in 15 days, A is more efficient than B.
Their efficiencies are inversely proportional to the time they take:
Efficiency Ratio = 1/Time₁ : 1/Time₂
Efficiency Ratio = Time₂ : Time₁
For the same amount of work, efficiency and time are inversely proportional.
Question: A can complete a job in 12 days, while B can complete the same job in 18 days. Find the ratio of their efficiencies.
Solution:
Efficiency of A : Efficiency of B = 1/12 : 1/18.
Taking the LCM of 12 and 18, we obtain:
Efficiency ratio = 18 : 12 = 3 : 2.
Answer: 3:2. A is 1.5 times as efficient as B.
When two people work together, their individual work rates are added, provided both contribute to the same task at constant rates.
If A completes a job in x days and B completes it in y days, their combined one-day work is:
Combined Time = (x × y) ÷ (x + y)
This shortcut applies when both work together on the same job.
Question: A can complete a job in 12 days and B can complete it in 18 days. How many days will they take to complete the job together?
Solution:
Combined time = (12 × 18) ÷ (12 + 18).
= 216 ÷ 30.
= 7.2 days.
Answer: 7.2 days, or 7⅕ days.
Efficiency method: Take total work as the LCM of 12 and 18, which is 36 units.
Time taken = 36 ÷ 5 = 7.2 days.
In many examination questions, choosing a convenient total work value helps avoid fractions. When individual completion times are given, their LCM is often a useful choice for total work.
Question: A is twice as efficient as B. If B completes a job in 20 days, how many days will A take?
Solution:
A's efficiency : B's efficiency = 2:1.
Time ratio is the inverse, so A's time : B's time = 1:2.
A's time = 20 × 1/2 = 10 days.
Answer: 10 days.
Question: A can complete a job in 15 days and B can complete it in 20 days. If the total work is taken as 60 units, compare their daily efficiencies.
Solution:
Total work = LCM of 15 and 20 = 60 units.
A's efficiency = 60 ÷ 15 = 4 units per day.
B's efficiency = 60 ÷ 20 = 3 units per day.
Efficiency ratio = 4:3.
Answer: A and B have an efficiency ratio of 4:3.
When all workers have the same efficiency and work for the same number of hours each day, the amount of work is directly proportional to the number of workers and the number of days.
Workers₁ × Days₁ = Workers₂ × Days₂
Use this relationship when the total work and individual working rates are comparable.
Question: Twelve workers can complete a job in 15 days. How many days will 20 workers take if everyone works at the same rate?
Solution:
12 × 15 = 20 × x.
180 = 20x.
x = 9 days.
Answer: 9 days.
Some questions involve one worker starting a task and another joining later, or a worker leaving before the task is completed. Calculate the work completed in each stage separately and then add the fractions of work.
Question: A can complete a job in 10 days. A works alone for 4 days, after which the remaining work is completed by B alone in 9 days. How long would B take to complete the entire job alone?
Solution:
A's one-day work = 1/10.
Work completed by A in 4 days = 4/10 = 2/5.
Remaining work = 1 − 2/5 = 3/5.
B completes 3/5 of the work in 9 days.
B's one-day work = (3/5) ÷ 9 = 1/15.
Answer: B would complete the entire job in 15 days.
Try these questions before checking the answer key.
Question 1: A can complete a job in 16 days and B in 24 days. What is the ratio of their efficiencies?
A) 2:3 B) 3:2 C) 4:3 D) 5:3
Question 2: A can complete a job in 10 days and B in 15 days. How long will they take to finish it together?
A) 5 days B) 6 days C) 7.5 days D) 8 days
Question 3: A is three times as efficient as B. If B completes a task in 24 days, how many days will A take?
A) 6 days B) 8 days C) 12 days D) 18 days
Question 4: Fifteen workers complete a job in 12 days. How many days will 20 equally efficient workers take?
A) 8 days B) 9 days C) 10 days D) 11 days
Question 5: A can complete a job in 12 days and B in 18 days. What fraction of the work can they complete together in 3 days?
A) 1/3 B) 5/12 C) 1/2 D) 2/3
1. B) 3:2: Efficiency ratio = 1/16 : 1/24 = 24:16 = 3:2.
2. B) 6 days: Combined time = (10 × 15) ÷ (10 + 15) = 150/25 = 6 days.
3. B) 8 days: A is three times as efficient as B, so A takes one-third of B's time: 24 ÷ 3 = 8 days.
4. B) 9 days: Workers × Days = Constant. 15 × 12 = 20 × x, so x = 9 days.
5. C) 1/2: Combined one-day work = 1/12 + 1/18 = 5/36. In 3 days, they complete 3 × 5/36 = 15/36 = 5/12. Therefore, the correct option is B) 5/12.
Start by learning how to calculate one-day work and how to convert completion times into efficiency ratios. Next, practise combined work, worker-and-day problems, and questions where one person joins or leaves during a task.
Use timed practice sets to improve speed, but prioritise accuracy first. Maintain a notebook of formulas and review the mistakes you make while calculating fractions, efficiency ratios, and remaining work.
Check the official SSC CGL notification and syllabus when released for the applicable 2027 examination details. This article is a preparation resource and does not guarantee that a particular question will appear in the examination.
Work equals work rate multiplied by time. If the whole job is taken as one unit, one-day work is the reciprocal of the number of days required.
For the same task, efficiency is inversely proportional to time. If A takes x days and B takes y days, their efficiency ratio is y:x.
Add the individual work rates and divide the total work by the combined rate to find the time required.
Choose the LCM of the given completion times as the total work. This often converts individual daily work into whole numbers.
Practise efficiency ratios, combined work rates, and the LCM method. Review each incorrect answer to identify calculation errors.
Time and Work questions become easier when you understand the relationship between work rate, time, and efficiency. Learn the core formulas, practise combined-work calculations, and use the LCM method when it simplifies the numbers. Regular practice can help you improve accuracy and confidence in SSC CGL Quantitative Aptitude.
Keep practising with Katara Academy and improve your accuracy one concept at a time.
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