The Blood Relation test checks how fast you untangle family links. You read a line, spot the speaker, and map everyone around them. Sometimes it’s a photo prompt. Sometimes it’s a coded string like A + B or A % B. Move through the chain left to right.
Track generations as up, down, or same level. Watch gender clues and words like “only” or “elder.” If gender isn’t given, “cannot be determined” might be right. When a sentence feels long, sketch a tiny tree. With a few runs, the patterns click and answers come quickly.
Blood Relation Test Questions with Answers
Question 1. Pointing to a woman, Arun says, “She is the daughter of my mother’s only brother.” How is the woman related to Arun?
a) Sister
b) Cousin
c) Niece
d) Aunt
Click for Answer:
b) Cousin – Mother’s only brother = maternal/paternal uncle; his daughter is Arun’s cousin.
Question 2. Pointing to a photograph, Riya says, “He is the son of the wife of my father’s only son.” How is the boy related to Riya?
a) Brother
b) Cousin
c) Nephew
d) Son
Click for Answer:
c) Nephew – “Father’s only son” is Riya’s brother (since it says son). His wife’s son is Riya’s nephew.
Question 3. Meena says, “That man’s mother’s husband is the only son of my paternal grandmother.” How is the man related to Meena?
a) Brother
b) Cousin
c) Uncle
d) Brother-in-law
Click for Answer:
a) Brother – Mother’s husband = his father. “Only son of my paternal grandmother” = my father. So his father is my father ⇒ he is my brother.
Question 4. Pointing to a lady, Karan says, “She is the mother of the only daughter of my parents.” How is the lady related to Karan?
a) Mother
b) Sister
c) Sister-in-law
d) Aunt
Click for Answer:
b) Sister – “Only daughter of my parents” is Karan’s sister. The lady is mother of that sister’s child ⇒ the lady is the sister herself.
Question 5. Pointing to a man, Priya says, “He is the husband of my mother’s sister.” How is the man related to Priya?
a) Maternal uncle
b) Paternal uncle
c) Brother-in-law
d) Cousin
Click for Answer:
a) Maternal uncle – Mother’s sister’s husband is maternal uncle.
Question 6. Looking at a photo, Varun says, “The woman is the daughter-in-law of the only son of my grandfather.” How is the woman related to Varun?
a) Mother
b) Aunt
c) Sister-in-law
d) Cousin
Click for Answer:
c) Sister-in-law – “Only son of my grandfather” = Varun’s father. His daughter-in-law is the wife of Varun or of Varun’s brother. That makes her Varun’s sister-in-law.
Question 7. Pointing to a boy, Neha says, “He is the son of the daughter of my father.” How is the boy related to Neha?
a) Son
b) Nephew
c) Brother
d) Cousin
Click for Answer:
b) Nephew – “Daughter of my father” = Neha or her sister. The daughter’s son is either Neha’s own son OR her sister’s son. Because the boy could be either, relative to Neha personally it’s nephew unless she’s that daughter. But since she says “the daughter of my father” (not “me”), standard interpretation points to sister’s son ⇒ nephew.
Question 8. Pointing at a man, Dhruv says, “He is the father of the husband of my only sister.” How is the man related to Dhruv?
a) Father
b) Father-in-law
c) Maternal uncle
d) Brother-in-law
Click for Answer:
b) Father-in-law – Husband of my sister = my brother-in-law. His father is my sister’s father-in-law; relative to Dhruv, commonly referred as father-in-law (of sibling) but precisely he is Dhruv’s sister’s father-in-law; in family terms for Dhruv he is also called “samdhi.” In MCQ convention, (b) fits best.
Question 9. Kavya says, “The girl in the picture is the only sister of the only son of my father.” How is the girl related to Kavya?
a) Sister
b) Cousin
c) Niece
d) Cannot be determined
Click for Answer:
a) Sister – “Only son of my father” is Kavya’s brother. His only sister (and Kavya is female) must be Kavya herself ⇒ sister.
Question 10. Pointing to a man, Rohan says, “His wife is the daughter of my mother-in-law.” How is the man related to Rohan?
a) Brother
b) Brother-in-law
c) Cousin
d) Uncle
Click for Answer:
b) Brother-in-law – “Daughter of my mother-in-law” is Rohan’s wife (or wife’s sister). Her husband is Rohan’s brother-in-law.
Question 11. Pointing at a man, Shreya says, “His daughter is the mother of my son.” How is the man related to Shreya?
a) Father
b) Father-in-law
c) Grandfather
d) Uncle
Click for Answer:
a) Father – “Mother of my son” = Shreya herself; the man’s daughter is Shreya ⇒ that would make the man Shreya’s father (a). But statement says “His daughter is the mother of my son” and Shreya is the mother of her son, so Shreya is the man’s daughter ⇒ he is her father.
Question 12. P is Q’s mother’s brother. R is Q’s father’s sister. How are P and R related to each other?
a) Husband–Wife
b) Brother–Sister
c) Cousins by blood
d) No direct blood relation (in-laws)
Click for Answer:
d) No direct blood relation (in-laws) – P is maternal uncle of Q; R is paternal aunt of Q. They are related through Q but not to each other by blood or marriage.
Question 13. A is the only daughter of B. C is B’s sister. How is C related to A?
a) Mother
b) Aunt
c) Sister
d) Cousin
Click for Answer:
b) Aunt – B’s sister is A’s aunt.
Question 14. X and Y are brothers. Y is the father of Z. How is X related to Z?
a) Father
b) Uncle
c) Brother
d) Cousin
Click for Answer:
b) Uncle – Father’s brother is uncle.
Question 15. M is N’s father. N is O’s mother. P is O’s father. How is M related to P?
a) Father
b) Father-in-law
c) Brother
d) Uncle
Click for Answer:
b) Father-in-law – M is the father of N; N is married to P (parents of O). Hence M is P’s father-in-law.
Question 16. Introducing a woman, Sohan says, “She is the wife of the son of my only sister.” How is the woman related to Sohan?
a) Daughter
b) Niece
c) Niece-in-law
d) Sister-in-law
Click for Answer:
c) Niece-in-law – Sohan’s sister’s son is his nephew; the son’s wife is niece-in-law.
Question 17. A says: “B is the only son of my grandfather’s only daughter.” How is B related to A?
a) Brother
b) Cousin
c) Uncle
d) Cannot be determined
Click for Answer:
a) Brother – Grandfather’s only daughter is A’s mother. Her only son is A’s brother.
Question 18. “She is the daughter of my wife’s brother,” said Rahul. How is the girl related to Rahul?
a) Daughter
b) Niece
c) Cousin
d) Sister-in-law
Click for Answer:
b) Niece – Wife’s brother’s daughter = niece (by marriage).
Question 19. Pointing to a man, Leena says, “His only sister is the mother of my only child.” How is the man related to Leena?
a) Brother
b) Husband
c) Brother-in-law
d) Father
Click for Answer:
a) Brother – If the man’s only sister is Leena, then the man is Leena’s brother.
Question 20. “The man in the photo is the father of the girl who is the only child of my parents,” says Ajay. How is the man related to Ajay?
a) Father
b) Brother-in-law
c) Brother
d) Uncle
Click for Answer:
a) Father – “Only child of my parents” = Ajay himself. The girl is Ajay. Her father is Ajay’s father.
Question 21. (Code
d) In a certain code: A + B means “A is the father of B”; A – B means “A is the sister of B”; A × B means “A is the wife of B”. Then, in P – Q × R, how is P related to R?
a) Sister-in-law
b) Sister
c) Aunt
d) Mother
Click for Answer:
a) Sister-in-law – Q × R ⇒ Q is wife of R. P – Q ⇒ P is sister of Q. Hence P is R’s sister-in-law.
Question 22. (Code
d) Use this legend: A % B = “A is mother of B”; A @ B = “A is brother of B”; A $ B = “A is daughter of B”. What does X @ Y % Z imply about X and Z?
a) X is son of Z
b) X is brother of Z
c) X is grandson of Z
d) Cannot be determined
Click for Answer:
d) Cannot be determined – X is Y’s brother; Y is Z’s mother ⇒ X is Z’s maternal uncle. Given options, the correct is: d) (since “maternal uncle” isn’t listed and others are wrong).
Question 23. “He is the son of the only son of my father,” said Meera pointing to a boy. How is the boy related to Meera?
a) Son
b) Nephew
c) Brother
d) Cannot be determined
Click for Answer:
b) Nephew
Question 24. (Code
d) Legend: A * B = “A is the mother of B”; A # B = “A is the brother of B”; A & B = “A is the father of B”. Which expression shows that M is the maternal uncle of N?
a) M # K * N
b) M & K * N
c) K * M # N
d) M # K & N
Click for Answer:
a) M # K * N – K * N ⇒ K is mother of N. M # K ⇒ M is brother of K. Thus M is mother’s brother ⇒ maternal uncle.
Question 25. (Code
d) Legend: A + B = “A is the husband of B”; A ÷ B = “A is the sister of B”; A − B = “A is the son of B”. What does (P + Q) − R imply about Q and R?
a) Q is daughter of R
b) Q is wife of R
c) Q is mother of R
d) Cannot be determined
Click for Answer:
d) Cannot be determined – P + Q ⇒ P is husband of Q (so Q is wife of P). (P + Q) − R means that Q’s husband P is the son of R. R is parent of P, not of Q. Q and R could be daughter-in-law and parent-in-law, but gender of R unknown; closest safe answer: cannot be determined.
Question 26. (Code
d) Legend: A ⊕ B = “A is the daughter of B”; A ⊗ B = “A is the brother of B”. In S ⊗ T ⊕ U, how is S related to U?
a) Son
b) Niece/Nephew
c) Brother-in-law
d) Cannot be determined
Click for Answer:
a) Son — From T ⊕ U, T is the daughter of U ⇒ U is T’s parent. From S ⊗ T, S is the brother of T ⇒ S is also a child of U, and since S is male, S is U’s son.
Question 38. A family has P, Q, R, S. P and Q are a married couple. R is the son of Q. S is the sister of R. How is S related to P?
a) Daughter
b) Niece
c) Sister
d) Cousin
Click for Answer:
a) Daughter – P and Q are parents of R and S ⇒ S is P’s daughter.
Question 28. (Data Sufficiency) How is M related to N? I. M is the wife of O; O is the son of N. II. P is the daughter of M and O.
a) I alone sufficient
b) II alone sufficient
c) Both together sufficient
d) Neither sufficient
Click for Answer:
a) I alone sufficient – From I: M (wife of O) and O is son of N ⇒ M is daughter-in-law of N. Statement II is unnecessary.
Question 29. (Coded) Legend: A ► B = “A is the grandmother of B”; A ▼ B = “A is the wife of B”. In P ▼ Q and P ► R, how are Q and R related?
a) Q is father of R
b) Q is husband of R’s parent
c) Q is mother of R
d) Cannot be determined
Click for Answer:
b) Q is husband of R’s parent – P ▼ Q ⇒ P is wife of Q. P ► R ⇒ P is grandmother of R. Therefore P is a female grandparent; her spouse Q is the grandfather, i.e., husband of R’s parent.
Question 30. (Data Sufficiency) Who is the father of K? I. J is the brother of K’s mother. II. L is the husband of K’s mother.
a) I alone sufficient
b) II alone sufficient
c) Both together sufficient
d) Neither sufficient
Click for Answer:
b) II alone sufficient – Husband of K’s mother is K’s father (L). I gives only maternal uncle info.
Question 31. (Data Sufficiency) How is P related to R? I. P is the sister of Q. II. Q is the father of R.
a) Statement I alone is sufficient
b) Statement II alone is sufficient
c) Both I and II together are sufficient
d) Neither I nor II is sufficient
Click for Answer:
c) Both I and II together are sufficient – From I: P is Q’s sister. From II: Q is R’s father. Therefore P is R’s paternal aunt.
Question 32. (Data Sufficiency) How is T related to V? I. T is the mother of U; U is the sister of V. II. V is the son of W; W is the husband of T.
a) I alone sufficient
b) II alone sufficient
c) Both I and II together sufficient
d) Neither sufficient
Click for Answer:
c) Both I and II together sufficient – I gives T mother of U and U sister of V ⇒ T is parent of V, but parent’s gender is confirmed as mother from I; II also shows T is married to W and V is son of W ⇒ confirms T is mother of V.
Question 33. (Data Sufficiency) What is the relation of X to Z? I. X is the only son of Y. II. Z is the daughter of Y’s daughter.
a) I alone sufficient
b) II alone sufficient
c) Both together sufficient
d) Neither sufficient
Click for Answer:
d) Neither sufficient – From II: Z is granddaughter through Y’s daughter. X being only son of Y (I) doesn’t connect directly; Z could be niece or unrelated through another child. Not enough to fix exact relation between X and Z.
Question 34. (Data Sufficiency) Is A the brother of C? I. A is the son of B. II. C is the daughter of B.
a) I alone sufficient
b) II alone sufficient
c) Both I and II together sufficient
d) Neither sufficient
Click for Answer:
c) Both I and II together sufficient – If A is son of B and C is daughter of B, they are siblings; A (male) ⇒ brother of C.
Question 35. (Coded) Legend: A + B = “A is the brother of B”; A × B = “A is the wife of B”; A % B = “A is the father of B”. Which of the following means D is the uncle of A?
a) A % C + D
b) D + C % A
c) D % C + A
d) A + C % D
Click for Answer:
b) D + C % A — D + C ⇒ D is brother of C; C % A ⇒ C is father of A. Therefore D is the brother of A’s father ⇒ A’s uncle.
Question 36. (Coded) Legend: A + B = “A is the daughter of B”; A − B = “A is the brother of B”; A % B = “A is the father of B”. Which expression makes I the niece of J?
a) I − C + J
b) I + C − J
c) J − C % I
d) C + I − J
Click for Answer:
b) I + C − J — I + C ⇒ I is daughter of C; C − J ⇒ C is brother of J. Hence I is the daughter of J’s brother ⇒ J’s niece.
Question 37. (Data Sufficiency) How is M related to R?
I. M is the mother of N; N is the sister of Q. II. R is the child of Q.
a) I alone is sufficient
b) II alone is sufficient
c) Both I and II together are sufficient
d) Neither I nor II is sufficient
Click for Answer:
c) Both I and II together are sufficient — From I, N and Q are siblings and M is N’s mother; under standard assumptions for these questions, M is also Q’s mother. From II, R is Q’s child. Therefore M is R’s grandmother. Either statement alone is insufficient.
Question 38. A is the daughter of C. C is the sister of D. E is the mother of D. F is the son of E. Which statement is true?
a) F is the paternal uncle of A
b) F is the maternal uncle of A
c) E is the paternal grandmother of A
d) C is the aunt of F
Click for Answer:
b) F is the maternal uncle of A — E is mother of D and (since C is D’s sister) also mother of C ⇒ E is A’s maternal grandmother. F, being E’s son, is brother of C (A’s mother) ⇒ A’s maternal uncle.
Question 39. (Coded) Legend: A @ B = “A is the mother of B”; A # B = “A is the brother of B”; A & B = “A is the father of B”. Which expression shows that L is the grandmother of N?
a) L @ K & N
b) K & L @ N
c) L # K & N
d) N & K @ L
Click for Answer:
a) L @ K & N — L @ K ⇒ L is mother of K; K & N ⇒ K is father of N. Hence L is N’s father’s mother ⇒ grandmother.
Question 40. Pointing to a boy, Priya says, “He is the son of my husband’s sister.” How is the boy related to Priya?
a) Nephew
b) Cousin
c) Brother-in-law
d) Son
Click for Answer:
a) Nephew — Husband’s sister’s son is Priya’s nephew.
Question 41. (Coded) Legend: A $ B = “A is the sister of B”; A % B = “A is the mother of B”; A − B = “A is the brother of B”. Which shows T is the maternal uncle of V?
a) V % M − T
b) T − M % V
c) M $ T % V
d) T $ M % V
Click for Answer:
b) T − M % V — M % V ⇒ M is mother of V. T − M ⇒ T is brother of M. Therefore T is V’s mother’s brother ⇒ maternal uncle.
Question 42. (Data Sufficiency) How is K related to N?
I. K is the son of L. II. L is the daughter of N.
a) I alone is sufficient
b) II alone is sufficient
c) Both I and II together are sufficient
d) Neither I nor II is sufficient
Click for Answer:
c) Both I and II together are sufficient — From II, L is N’s daughter. From I, K is L’s son. Hence K is N’s grandson. Either statement alone is insufficient.
Question 43. P and Q are siblings. R is the son of P. S is the daughter of Q. How are R and S related?
a) Brother and sister
b) Cousins
c) Uncle and niece
d) Nephew and aunt
Click for Answer:
b) Cousins — Children of siblings (R is P’s son; S is Q’s daughter) are cousins.
Question 44. (Coded) Legend: A + B = “A is the child of B”; A × B = “A is the sibling of B”; A % B = “A is the spouse of B”. What does X × Y + Z imply about X and Z?
a) X is the son of Z
b) X is the daughter of Z
c) X is the grandchild of Z
d) Cannot be determined
Click for Answer:
d) Cannot be determined — Y + Z ⇒ Y is child of Z. X × Y ⇒ X is sibling of Y, so X is also a child of Z. But X’s gender is unknown, so we cannot say “son” or “daughter,” and “grandchild” is incorrect. Hence Cannot be determined.
