Blood Relation

What is Blood Relation?

In Blood Relation questions, you are given a set of statements describing relationships among family members, and you are required to determine the relationship between particular individuals.

Types of Relations:

• Maternal: Mother’s side (maternal uncle, maternal grandfather)
• Paternal: Father’s side (paternal aunt, paternal grandfather)
• Direct Relations: Father, Mother, Brother, Sister, Son, Daughter
• Indirect or Coded Relations: Questions involving coded language or symbolic representation

Tips & Tricks

• Break the statement into parts and convert into a family tree diagram.
• Start from the last sentence to find the direct relation.
• Use gender clues like "he", "she", "son of", "daughter of".
• Remember generation difference: parents (+1), children (-1), same level (siblings).
• Practice coded language questions separately.

30+ Previous Year Questions with Solutions

1. SSC CHSL 2022: A is the sister of B. B is the father of C. How is A related to C?
   Answer: Aunt
2. RRB NTPC 2021: Pointing to a photograph, Rani said, "He is the son of my grandfather’s only son." Who is the person in the photograph?
   Answer: Brother
3. SSC CGL 2020: If A + B means A is the mother of B, A – B means A is the brother of B, A * B means A is the sister of B, then what does P + Q – R mean?
   Answer: P is the mother of Q, and Q is the brother of R → P is the mother of R
4. HSSC Clerk 2019: Introducing a boy, a girl said, “He is the son of the daughter of the father of my uncle.” How is the boy related to the girl?
   Answer: Cousin
5. SSC MTS 2020: A is the brother of B. B is the daughter of C. C is the wife of D. How is A related to D?
   Answer: Son
6. RRB Group D 2018: A is the daughter of B. B is the wife of C. C is the son of D. How is A related to D?
   Answer: Granddaughter
7. SSC JE 2019: In a family of 6 members – A, B, C, D, E and F – there are two married couples. D is the grandmother of A, who is the wife of F. B is the brother of F. Who is married to D?
   Answer: C
8. SSC GD 2021: Pointing to a girl, Ramesh said, “She is the only daughter of my father’s only daughter.” How is the girl related to Ramesh?
   Answer: Niece
9. SSC CGL 2019: A is the father of B. C is the mother of B. D is the brother of A. How is D related to C?
   Answer: Brother-in-law
10. SSC MTS 2017: If P is the son of Q, Q is the daughter of R, and S is the father of R, then how is P related to S?
    Answer: Great grandson
11. HSSC JE 2017: A man said, “My mother is your mother’s daughter-in-law.” What is the relation of the man to the other person?
    Answer: Brother
12. SSC CHSL 2016: X is the son of Y. Y is the daughter of Z. How is X related to Z?
    Answer: Grandson
13. SSC GD 2020: If A is the sister of B, and B is the brother of C, and C is the son of D, then how is D related to A?
    Answer: Father or Mother
14. RRB ALP 2018: A says to B: “You are my mother’s only son’s wife.” How is A related to B?
    Answer: Father-in-law or Mother-in-law
15. SSC CGL 2021: A is the son of B. C, who is the mother of B, is the daughter of D. How is D related to A?
    Answer: Great-grandparent
16. SSC MTS 2015: Pointing to a man, a woman said: “His mother is the only daughter of my mother.” How is the man related to the woman?
    Answer: Son
17. SSC JE 2018: A + B means A is the brother of B, A * B means A is the father of B, A – B means A is the sister of B. Then what is the relation between A * B – C?
    Answer: A is the father of C
18. SSC CHSL 2014: If A + B means A is the father of B, A / B means A is the mother of B, A * B means A is the sister of B, then how is E related to T in E / M * T?
    Answer: Grandmother
19. HSSC Group D 2018: A is the father of B, who is the daughter of C. D is the wife of A. How is C related to D?
    Answer: D is C (B’s mother), so C must be D → Same person
20. RRB NTPC 2019: If P is the brother of Q and Q is the sister of R, and R is the son of T, then how is T related to P?
    Answer: Father or Mother