Blood Relation Reasoning - Complete Guide with Tricks, Practice & Tests

Introduction: What is Blood Relation Reasoning?

Blood Relation is a critical part of Logical Reasoning where a candidate needs to determine the relationships between individuals based on given information. These questions test your analytical thinking, observational skills, and how well you can process relational information in limited time. Mastering this topic boosts your performance significantly in exams like SSC CGL, SSC CHSL, Banking (IBPS, SBI), Railway Group D, NTPC, and Defence exams like CDS, NDA, and AFCAT.

Importance of Blood Relation Questions in Exams

Reasoning section generally carries 20-30% questions based on direct or indirect Blood Relation, especially in SSC and Bank exams. As these questions are quick and scoring, missing out on them can cost valuable marks. If you can solve Blood Relation questions within 20-30 seconds using tricks and family trees, your overall reasoning score can improve dramatically.

Basic Terms and Relations (Full List in English and Hindi)

Relation (English)	Meaning (Hindi)
Father	पिता
Mother	माता
Brother	भाई
Sister	बहन
Son	पुत्र
Daughter	पुत्री
Uncle	चाचा / मामा
Aunt	चाची / मामी
Grandfather	दादा / नाना
Grandmother	दादी / नानी
Cousin	चचेरा / ममेरी भाई-बहन
Father-in-law	ससुर
Mother-in-law	सास

Generation Gap Theory

Understanding the gap between generations helps to easily identify relationships:

• Same generation: Brother-Sister, Cousins
• One generation above: Father, Mother, Uncle, Aunt
• Two generations above: Grandfather, Grandmother

Symbols and Notations

Many questions use symbols instead of words. Example:

• A + B => A is the father of B
• A - B => A is the mother of B
• A * B => A is the sister of B
• A / B => A is the brother of B

Types of Blood Relation Questions

1. Direct Relationship Questions
2. Indirect/Chain Relationship Questions
3. Puzzle based Blood Relation Questions
4. Coded Blood Relation Questions

Important Tricks for Blood Relation

1. Identify gender first whenever possible.
2. Draw a simple family tree using boxes and circles.
3. Work backwards if the statement is confusing.
4. Use abbreviation codes (F = Father, M = Mother).
5. Practice visualization to quickly map relations mentally.

Family Tree Method

Example Diagram: (I will add a family tree diagram here if you allow uploading images on your site.)

Examples (Easy to Hard Level)

Easy Level Example 1

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

Solution: A is C's father.

Moderate Level Example 2

Question: P is the brother of Q. Q is the daughter of R. How is P related to R?

Solution: P is R's son.

Hard Level Example 3

Question: Pointing to a woman, a man said, "She is the daughter of my grandfather's only son." How is the woman related to the man?

Solution: The woman is the man's sister.

Practice Questions

Set 1: Easy Questions

• A is the son of B. C is the brother of A. How is C related to B?
• X is the sister of Y. Y is the son of Z. How is X related to Z?
• Pointing to a man, a woman said, "He is my only son." How is the man related to the woman?

Set 2: Moderate Questions

• R is the father of S. T is the son of R. How is T related to S?
• W is the brother of X. X is the father of Y. How is W related to Y?
• A is the brother of B. C is the daughter of A. How is C related to B?

Set 3: Advanced Questions

• A is the sister of B. B is the brother of C. C is the mother of D. How is A related to D?
• P is the son of Q's daughter. How is P related to Q?

Previous Year Questions (SSC, Bank, Railway)

Question 1 (SSC CGL 2022): Pointing to a boy, a woman said, "He is the only son of my mother's daughter." How is the boy related to the woman?

Answer: Son.

Mock Test - Blood Relation

Test your skills with our free mock test below!

Start Mock Test

Conclusion

Blood Relation is not tough if approached with the right techniques and regular practice. Try solving at least 20 questions daily, and gradually increase your difficulty level. Using family trees and gender identification shortcuts will significantly reduce your solving time and boost accuracy.