Blood Relation – General Aptitude for GATE, PSU, ESE, AE/JE | Priyanka Ma’am

Blood Relation is an important topic in General Aptitude and is frequently asked in GATE, PSU, ESE, AE/JE exams. It tests your logical thinking and ability to understand family relationships.

Basic Concepts

Blood relation questions are based on identifying relationships between family members using given statements.

• Direct Relations: Father, Mother, Son, Daughter
• Indirect Relations: Uncle, Aunt, Cousin, Grandparents

Family Tree Representation

Drawing a family tree helps in solving questions quickly and accurately.

• Use symbols for male and female
• Connect generations properly
• Avoid assumptions

Important Terms

• Paternal: Father’s side
• Maternal: Mother’s side
• Siblings: Brothers and sisters
• In-laws: Relations through marriage

Types of Questions

• Direct relationship questions
• Puzzle-based family questions
• Coded blood relations
• Pointing/Direction-based relations

Solved Examples

Example 1

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

A is father of B and B is sibling of C → A is father of C

Example 2

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

P is mother of Q and Q is sibling of R → P is mother of R

Example 3

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

B is daughter of C → A is also child of C → A is son of C

Example 4

Pointing to a man, a woman says, “He is the son of my mother’s only son.” How is the man related to the woman?

Mother’s only son = woman's brother or herself (if female speaker)
Thus, son of that person = her son

Shortcut Tricks

• Draw family tree for complex questions
• Break statements step by step
• Identify gender clearly
• Focus on keywords like “only”, “either”, “neither”

Questions

Q1. A is the sister of B. B is the father of C. How is A related to C?

A is sister of father → A is aunt of C

Q2. X is the father of Y. Y is the mother of Z. How is X related to Z?

X is father of Y → Y is mother of Z → X is grandfather of Z

Exam Tips

• Always draw diagram for clarity
• Avoid assumptions not given in question
• Focus on relationship chain
• Practice different question types

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