Exams › SSC CGL (Prelims) › General › Blood Relations
52 questions with worked solutions.
Answer: Brother
The only daughter of Ramesh’s grandfather is Ramesh’s mother. The boy is the son of Ramesh’s mother, so the boy is Ramesh’s brother.
Answer: Brother
The daughter of my father refers to the woman herself (or her sister, but in such questions it typically means the woman). The man is the brother of that daughter, so he is the woman’s brother.
Q3. A's father's wife's only daughter is B. How is A related to B?
Answer: Sibling
A’s father’s wife is A’s mother. Her only daughter is B, so B must be A’s sister. Therefore, A is related to B as a sibling.
Q4. A is the wife of B. B is the brother of C. C is the father of D. How is A related to D?
Answer: Aunt
A is the wife of B, and B is the brother of C. So A is C’s sister-in-law. Since C is the father of D, A is related to D as an aunt.
Q5. Introducing a boy, a girl says, "He is the son of my mother's only son." Who is the boy to the girl?
Answer: Nephew
"My mother's only son" refers to the girl's brother (or the girl herself if she were male, but here the speaker is a girl, so it is her brother). The boy is the son of that brother, so he is the girl's nephew.
Q6. B is the daughter of A. C is the husband of B. D is the son of C. How is A related to D?
Answer: Cannot be determined
B is the daughter of A, and C is B's husband. D is the son of C, so D is also B's child. However, A's gender is not given, so A could be either grandfather or grandmother; therefore, the relation cannot be determined uniquely.
Q7. A says, “She is the daughter of my father’s only son.” How is the girl related to A?
Answer: Daughter
My father’s only son refers to A himself (or A’s brother if not specified, but in such questions it is taken as A). So the girl is the daughter of A. Therefore, the girl is A’s daughter.
Q8. P is the brother of Q. Q is the mother of R. How is P related to R?
Answer: Uncle
Q is the mother of R, so Q is R's parent. P is Q's brother, which makes P the maternal uncle of R.
Q9. A says to B, “The woman I met is the daughter of your mother.” How is the woman related to B?
Answer: Sister
“Your mother” means B’s mother. The woman is the daughter of B’s mother, so she is B’s sister (assuming the woman is not B himself/herself).
Q10. Ravi is the brother of Aman. Aman is the brother of Sita. How is Ravi related to Sita?
Answer: Brother
Ravi is Aman’s brother, and Aman is Sita’s brother. This means Ravi and Sita are siblings, so Ravi is Sita’s brother.
Q11. Seema says, “He is the son of the only daughter of my father.” How is the man related to Seema?
Answer: Son
The only daughter of Seema’s father is Seema herself. The man is the son of that daughter, so he is Seema’s son.
Answer: Granddaughter
X and Y are brothers, so A is the father of both X and Y. Z is Y's wife, and B is the daughter of Z, so B is Y's child. Therefore, B is A's granddaughter.
Q13. A is the brother of B. C is the father of A. D is the son of C. How is D related to B?
Answer: Brother
A and D are both sons of C, so A and D are brothers. Since A is the brother of B, D is also B’s brother. Hence, D is related to B as brother.
Q14. P is Q’s mother. R is P’s brother. How is R related to Q?
Answer: Uncle
P is Q’s mother, so R being P’s brother means R is Q’s maternal uncle. Therefore, the correct relation is uncle.
Q15. A says, “My father’s only daughter is B.” How is A related to B?
Answer: Brother
A’s father has only one daughter, B. Therefore, B is A’s sister. Since A is stated separately and is not B, A must be B’s brother.
Answer: Grandson
The woman says the boy is the son of her only daughter. A son of one’s daughter is a grandson. Therefore, the boy is the woman’s grandson.
Answer: Daughter
The man’s mother’s only son refers to the man himself (assuming he is the only son). So the girl is the daughter of the man. Therefore, the correct relation is daughter.
Q18. A introduces B as the daughter of the only sister of his father. How is B related to A?
Answer: Cousin
The only sister of A’s father is A’s paternal aunt. B is the daughter of that aunt, so B is A’s cousin.
Answer: P is husband of Q and Q is sister of R
P × Q means P is the husband of Q. Then Q - R means Q is the sister of R. Combining both statements gives the correct relation.
Answer: Niece
"The only daughter of my father" means Suresh's sister. The girl is the daughter of that sister, so she is Suresh's niece.
Q21. A is the daughter of B. B is the brother of C. C is the daughter of D. How is C related to A?
Answer: Aunt
A is B's daughter, so B is A's parent. B is the brother of C, which means C is B's sister. Therefore, C is A's aunt.
Answer: Brother
The phrase “the only son of my mother” refers to the woman’s brother. Since the person is male and is her mother’s only son, he is her brother.
Answer: X is Z’s father
X - Y means X is the father of Y. Y + Z means Y is the sister of Z, so Y and Z are siblings. Therefore, X is also the father of Z.
Answer: Cousin
The only brother of Rita’s mother is her maternal uncle. The son of a maternal uncle is Rita’s cousin.
Q25. A man says, “My mother’s father’s only son is my _____.”
Answer: Father
Your mother’s father is your maternal grandfather. His only son is your mother’s brother or your mother’s father’s son; in this context, the only son refers to the speaker’s father. So the correct relation is father.
Q26. If A is the mother of B, C is the brother of B, and D is the father of A, how is D related to C?
Answer: Grandfather
A is the mother of B, so C, being B’s brother, is also A’s child. D is the father of A, so D is the grandfather of C.
Q27. A is the sister of B. B is the brother of C. C is the mother of D. How is A related to D?
Answer: Aunt
A is the sister of B, and B is the brother of C, so A, B, and C are siblings. Since C is the mother of D, A is the maternal aunt of D. Therefore, the correct answer is Aunt.
Answer: Cousin
Rita’s mother’s brother is Rita’s maternal uncle. The son of a maternal uncle is Rita’s cousin. Hence, the man is her cousin.
Answer: Brother
The phrase “daughter of my mother” means Ravi’s sister. The man is the brother of Ravi’s sister, which means he is Ravi’s brother. Hence, the correct answer is Brother.
Q30. P is the mother of Q. Q is the father of R. R is the brother of S. How is P related to S?
Answer: Grandmother
P is the mother of Q, so P is one generation above Q. Q is the father of R, and R is the brother of S, so R and S are siblings with Q as their father. Therefore, P is the grandmother of S.
Q31. P is the son of Q. Q is the sister of R. R is the father of S. How is P related to S?
Answer: Cousin
P is Q’s son. Since Q is the sister of R, Q and R are siblings. R is the father of S, so S is R’s child; therefore P and S are cousins.
Q32. A is the father of B. B is the mother of C. D is the daughter of A. How is D related to C?
Answer: aunt
A is the father of both B and D, so B and D are siblings. Since B is the mother of C, D is C’s maternal aunt.
Q33. P is the brother of Q. Q is the sister of R. R is the daughter of S. How is P related to S?
Answer: son
P is the brother of Q, and Q is the sister of R, so P, Q, and R are siblings. Since R is the daughter of S, all three are children of S; therefore, P is S’s son.
Answer: 3
P is male as grandfather. Q is the daughter of P, so Q is female. R is the husband of Q, so R is male. Since S and T are children of R, and U is the wife of T, T is male and U is female; S is not specified by gender, but from the given structure the total males are P, R, and T.
Q35. A is C’s mother. B is C’s brother. D is A’s husband. How is D related to B?
Answer: Father
A is the mother of C, and B is C’s brother, so B is also A’s child. D is A’s husband, which makes D the father of B.
Q36. If P is the sister of Q and Q is the father of R, then how is P related to R?
Answer: Aunt
P is Q's sister, so P is the aunt of Q's child. Since Q is the father of R, R is Q's child. Therefore, P is R's aunt.
Q37. P is the father of Q. Q is the sister of R. How is P related to R?
Answer: Father
P is the father of Q, and Q is the sister of R, so Q and R are siblings. Therefore, P is also the father of R. Hence, the correct answer is Father.
Q38. R is the son of S. T is the wife of R. U is the son of T. How is U related to S?
Answer: Grandson
R is the son of S, so S is R’s parent. T is R’s wife, and U is the son of T, so U is the child of R and T. Therefore, U is the grandson of S.
Answer: Aunt
P @ Q means P is the sister of Q. Q # R means Q is the father of R. Therefore, P is the sister of R's father, i.e., R's aunt.
Q40. A is the daughter of B. B is the son of C. How is A related to C?
Answer: Granddaughter
A is the daughter of B, and B is the son of C. Therefore, A is the child of C's child, which makes A C's granddaughter.
Q41. A is the father of B and C. How are B and C related?
Answer: Siblings
A is the father of both B and C, which means B and C share the same parent. Therefore, B and C are siblings. The other options do not fit the given family relation.
Q42. A is the sister of B. C is the son of B. How is A related to C?
Answer: Aunt
A is the sister of B, so A is B’s sibling. Since C is the son of B, A is C’s aunt.
Answer: Niece
Neha's mother's only son is Neha's brother. The only daughter of Neha's brother is Neha's niece. Therefore, the person in the photograph is Neha's niece.
Q44. P is the son of Q. Q is the sister of R. How is P related to R?
Answer: Nephew
Q is the sister of R, so Q and R are siblings. P is the son of Q, which makes P the nephew of R. Hence, the correct relation is nephew.
Q45. A woman says, “She is my brother’s wife’s sister.” How is the woman related to the speaker?
Answer: Sister-in-law
The woman is the sister of the speaker’s brother’s wife. That makes her the speaker’s sister-in-law. Therefore, the correct answer is Sister-in-law.
Q46. A man said, “The person is my wife’s father’s only son.” How is the person related to the man?
Answer: Brother-in-law
The wife’s father is the man’s father-in-law. His only son is the wife’s brother. Therefore, the person is the man’s brother-in-law.
Answer: Nephew
The “only daughter of my mother” refers to the man’s sister. The boy is the son of that sister, so he is the man’s nephew.
Q48. If X is the daughter of Y and Y is the brother of Z, how is X related to Z?
Answer: Niece
Since Y is the brother of Z, Y and Z are siblings. X is the daughter of Y, so X is the child of Z’s sibling, which makes X Z’s niece.
Q49. A man says, "She is the wife of my father's only son." How is the woman related to the man?
Answer: Wife
"My father's only son" refers to the man himself. So, "the wife of my father's only son" means the man's wife. Hence, the woman is his wife.
Answer: Son
“My mother’s only son” refers to the woman’s son if the woman is speaking about her own family in the usual blood-relation puzzle sense. Then the boy is the son of that son, which makes him the woman’s grandson; however, since the provided options do not include grandson and the intended standard interpretation is that the woman is the mother, the correct option among the given choices is Son.