SSC CGL 2027 Blood Relation Questions with Family-Tree Method

Blood relation is an important topic in the General Intelligence and Reasoning section of the SSC CGL examination. These questions test a candidate's ability to understand family relationships and determine how two or more people are related to each other. A clear understanding of family structures and the use of simple diagrams can make these questions easier to solve.

For SSC CGL 2027 preparation, candidates should learn common relationship terms, understand generation levels, practise family-tree diagrams, and solve questions involving coded relationships. This guide explains the basic concepts, step-by-step solving methods, practice MCQs with answers, and useful preparation tips.

What Are Blood Relation Questions?

Blood relation questions describe relationships between family members. Candidates must use the information provided to identify a person's father, mother, brother, sister, son, daughter, uncle, aunt, cousin, or another relative.

Example: A is the brother of B. B is the sister of C. How is A related to C?

Answer: Brother

Explanation: A and B are siblings, and B and C are siblings. Therefore, A and C are also siblings. Since A is male, A is C's brother.

The key to solving these questions is to connect the relationships carefully rather than guessing from a single sentence.

Common Family Relationships

Before solving blood relation questions, revise the meanings of commonly used relationship terms.

• Father: A male parent.
• Mother: A female parent.
• Son: A male child.
• Daughter: A female child.
• Brother: A male sibling.
• Sister: A female sibling.
• Grandfather: The father of a person's parent.
• Grandmother: The mother of a person's parent.
• Uncle: Commonly, the brother of a parent or the husband of an aunt.
• Aunt: Commonly, the sister of a parent or the wife of an uncle.
• Nephew: The son of a person's sibling.
• Niece: The daughter of a person's sibling.
• Cousin: The child of an aunt or uncle.

Pay attention to the exact wording of a question. Terms such as maternal uncle and paternal uncle provide additional information about which side of the family is involved.

What Is the Family-Tree Method?

The family-tree method is a visual technique used to represent relationships between family members. Instead of keeping every relationship in memory, candidates draw a simple diagram showing generations, parent-child connections, and siblings.

A basic family tree can be represented as follows:

       Grandfather ── Grandmother
                 |
          ----------------
          |              |
        Father          Uncle
          |
     -------------
     |           |
   Son         Daughter

In this illustration, the son and daughter are siblings. Their father and uncle are also siblings, while the grandfather and grandmother belong to the generation above them.

When drawing a family tree, keep each generation on a separate level. This makes it easier to distinguish parents, children, grandparents, and other relatives.

Step-by-Step Method to Solve Blood Relation Questions

1. Read the complete question: Identify every person mentioned and note each relationship statement.
2. Identify the reference person: Determine whose relationship the question asks you to find.
3. Mark gender information: Record whether each person is male, female, or unspecified.
4. Arrange generations: Place grandparents and parents above their children in the family tree.
5. Connect the relationships: Use lines or labels to show parent-child and sibling relationships.
6. Trace the connection: Start with the person named in the question and follow the diagram to the other person.
7. Check the final relationship: Confirm both the relationship and the direction in which it is asked.

For short questions, you may solve the relationship mentally. For questions involving several people or multiple generations, drawing a family tree can reduce confusion and prevent mistakes.

Important Rules for Blood Relation Questions

1. Parent and Child Relationships

If A is the father of B, A is one generation above B. If B is the father of C, then A is C's grandfather.

Example: P is the mother of Q, and Q is the father of R. How is P related to R?

Answer: Grandmother.

2. Sibling Relationships

Brothers and sisters belong to the same generation. If two people share the same parents, they are siblings. However, a question must provide enough information before you can conclude that two people are siblings.

3. Maternal and Paternal Relationships

Maternal relationships are connected to a person's mother, while paternal relationships are connected to a person's father.

• Maternal uncle: The brother of one's mother.
• Paternal uncle: The brother of one's father.
• Maternal grandparents: The parents of one's mother.
• Paternal grandparents: The parents of one's father.

4. Relationships Through Marriage

Some questions include relationships formed through marriage, such as a brother-in-law, sister-in-law, father-in-law, or mother-in-law. Read these questions carefully and distinguish relationships by blood from relationships by marriage.

SSC CGL 2027 Blood Relation Practice Questions

Attempt the following practice MCQs before checking the answers. These are illustrative practice questions for revision and are not presented as official previous-year questions.

Question 1: Basic Relationship

A is the brother of B. B is the sister of C. How is A related to C?

A) Father
B) Brother
C) Uncle
D) Cousin

Correct Answer: B) Brother

Explanation: A and B are siblings, and B and C are siblings. Therefore, A is C's brother.

Question 2: Parent-Child Relationship

P is the mother of Q. Q is the father of R. How is P related to R?

A) Aunt
B) Sister
C) Grandmother
D) Mother

Correct Answer: C) Grandmother

Explanation: P is Q's mother, and Q is R's father. Therefore, P is R's grandmother.

Question 3: Uncle Relationship

R is the brother of S. S is the mother of T. How is R related to T?

A) Father
B) Maternal uncle
C) Paternal uncle
D) Grandfather

Correct Answer: B) Maternal uncle

Explanation: S is T's mother, and R is S's brother. Therefore, R is T's maternal uncle.

Question 4: Family-Tree Method

A is the father of B. B is the sister of C. How is A related to C?

A) Uncle
B) Brother
C) Father
D) Grandfather

Correct Answer: C) Father

Explanation: B and C are siblings. Since A is B's father, A is also C's father in the stated family relationship.

Question 5: Grandparent Relationship

M is the daughter of N. N is the son of P. How is P related to M?

A) Father or Mother
B) Uncle or Aunt
C) Grandfather or Grandmother
D) Brother or Sister

Correct Answer: C) Grandfather or Grandmother

Explanation: N is M's parent, and P is N's parent. Therefore, P is M's grandparent. The gender of P is not specified.

Question 6: Sister Relationship

X is the sister of Y. Y is the son of Z. How is X related to Z?

A) Daughter
B) Mother
C) Aunt
D) Grandmother

Correct Answer: A) Daughter

Explanation: X and Y are siblings. Since Y is Z's son, X is also Z's child. As X is female, X is Z's daughter.

Question 7: Maternal Relationship

K is the brother of L. L is the mother of M. How is K related to M?

A) Paternal uncle
B) Maternal uncle
C) Brother
D) Grandfather

Correct Answer: B) Maternal uncle

Explanation: L is M's mother, and K is L's brother. Therefore, K is M's maternal uncle.

Question 8: Multiple Generations

A is the mother of B. B is the mother of C. How is A related to C?

A) Aunt
B) Sister
C) Grandmother
D) Daughter

Correct Answer: C) Grandmother

Explanation: A is B's mother, and B is C's mother. Therefore, A is C's grandmother.

Common Mistakes to Avoid

• Confusing the direction of relationships: The father of A and A's father refer to the same relationship, but questions may ask for a different person's connection.
• Ignoring gender information: Gender is important when distinguishing a brother from a sister or an uncle from an aunt.
• Mixing generations: Keep grandparents, parents, and children on separate levels in the family tree.
• Assuming missing information: Do not infer gender or a specific family connection unless the question provides enough information.
• Misreading pronouns: Track every use of he, she, his, her, and their carefully.
• Solving complicated questions mentally: Draw a family tree when multiple people and generations are involved.
• Rushing through the final step: Read the question again to confirm whose relationship is being asked.

Preparation Strategy for SSC CGL 2027

Regular practice can help candidates recognise family relationships more quickly and accurately. Begin with direct relationships and gradually progress to questions involving several family members.

• Practise 10–15 blood relation questions daily.
• Revise common family relationship terms.
• Draw family trees for multi-person questions.
• Practise identifying generation levels and gender.
• Attempt timed reasoning exercises to improve speed.
• Maintain a notebook of difficult questions and mistakes.
• Include blood relation questions in full-length reasoning mock tests.

After each practice session, review incorrect answers and identify where the relationship chain became confusing. Focus on understanding the logic rather than memorising answers.

Frequently Asked Questions (FAQs)

1. What are blood relation questions in SSC CGL?

Blood relation questions test the ability to identify relationships between family members using statements about parents, children, siblings, grandparents, uncles, aunts, and other relatives.

2. What is the family-tree method?

The family-tree method is a diagram-based technique that represents family members and their connections. It helps candidates visualise generations and trace relationships step by step.

3. How can I solve blood relation questions faster?

Identify the reference person, note gender information, arrange generations, draw a simple family tree when necessary, and trace the relationship carefully.

4. What is the difference between maternal and paternal relationships?

Maternal relationships are connected to a person's mother and her side of the family. Paternal relationships are connected to a person's father and his side of the family.

5. How many blood relation questions should I practise daily?

Start with 10–15 questions daily and gradually increase practice according to your accuracy and speed. Review mistakes regularly to strengthen your understanding.

Conclusion

Blood relation questions become easier when candidates understand family terminology, identify generation levels, and trace connections systematically. For SSC CGL 2027, the family-tree method can be especially useful for questions involving several people or multiple generations.

Practise regularly, verify each relationship, and learn from mistakes to improve your reasoning skills. Continue preparing with Katara Academy to build confidence for competitive examinations.