Blood Relations — Practice

Question 1

Pointing to a photograph, Ravi said, "She is the daughter of my grandfather's only son." How is the girl in the photograph related to Ravi?
(a) Mother (b) Sister (c) Aunt (d) Cousin

Accepted Answer

(b) Sister.

Parse backwards: my grandfather → his only son = Ravi's father ('only' excludes uncles) → the daughter of Ravi's father = Ravi's sister.

Question 2

A is the brother of B. B is the sister of C. C is the father of D. How is A related to D?
(a) Father (b) Brother (c) Uncle (d) Grandfather

Accepted Answer

(c) Uncle.

A, B, C are siblings (A male, B female). C is D's father, so C's brother A is D's uncle.

Question 3

A woman pointing to a man says, "His mother is the only daughter of my mother." How is the woman related to the man?
(a) Sister (b) Aunt (c) Mother (d) Grandmother

Accepted Answer

(c) Mother.

'The only daughter of my mother' is the speaker herself (she is a woman, and her mother has exactly one daughter). So his mother = the woman: she is his mother.

Question 4

A + B means A is the mother of B; A × B means A is the father of B; A ÷ B means A is the sister of B. Which expression shows that P is the maternal grandfather of S?
(a) P + Q × S (b) P × Q + S (c) P ÷ Q × S (d) P + Q ÷ S

Accepted Answer

(b) P × Q + S.

P × Q: P is Q's father. Q + S: Q is S's mother. P is the father of S's mother — maternal grandfather. In (a), P is the mother of S's father (paternal grandmother); in (c), P is S's aunt; in (d), P is the mother of S's sister, i.e., S's mother.

Question 5

A is married to C. D is the son of A. B is the brother of C. E is the daughter of D. How is E related to C?
(a) Niece (b) Daughter (c) Granddaughter (d) Sister

Accepted Answer

(c) Granddaughter.

A and C are a couple, so D (A's son) is also C's son. E is D's daughter, hence C's granddaughter. B (C's brother) is a distractor.

Question 6

Pointing to a woman, Naresh said, "She is the daughter of the only child of my grandmother." How is the woman related to Naresh?
(a) Sister (b) Cousin (c) Mother (d) Niece

Accepted Answer

(a) Sister.

The only child of Naresh's grandmother is Naresh's own parent ('only' removes every aunt/uncle). The daughter of that parent is Naresh's sister.

Question 7

N # L means N is the mother of L; L $ P means L is the father of P; P * Q means P is the sister of Q. In N # L $ P * Q, how is Q related to N?
(a) Granddaughter (b) Grandson (c) Grandchild — gender cannot be determined (d) Niece

Accepted Answer

(c) Grandchild — gender cannot be determined.

N is L's mother; L is P's father; P is Q's sister, so Q is also L's child — making Q N's grandchild. But no statement gives Q's gender ('P is the sister of Q' fixes only P as female), so grandson vs granddaughter cannot be decided.

Question 8

A man, the only child of his parents, said, "This girl is the wife of the grandson of my mother." How is the girl related to the man?
(a) Daughter (b) Daughter-in-law (c) Niece (d) Sister-in-law

Accepted Answer

(b) Daughter-in-law.

Since the man is his mother's only child, his mother's grandson must be his own son. The wife of his son is his daughter-in-law. Without 'only child', the grandson could be a nephew and the question would be ambiguous — the qualifier is what makes (b) forced.

Question 9

Rahul's mother is the only daughter of Monika's father. How is Monika's husband related to Rahul?
(a) Uncle (b) Brother (c) Father (d) Grandfather

Accepted Answer

(c) Father.

The only daughter of Monika's father is Monika herself, so Rahul's mother = Monika. Her husband is therefore Rahul's father.

Question 10

P is the brother of Q. R is the mother of P. S is the father of R. How is S related to Q?
(a) Grandfather (b) Maternal grandfather (c) Father (d) Uncle

Accepted Answer

(b) Maternal grandfather.

P and Q are siblings, so R is Q's mother too. S is the father of R — Q's mother's father — which is precisely the maternal grandfather. Option (a) is incomplete: the chain runs through the mother, and the more specific option is the correct one.

Practice — Blood Relations

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