AMCAT Logical Ability: Blood Relations 2 — Questions and Answers
Question 1: Pointing to a woman, Ramesh said, 'She is the daughter of the only child of my grandmother.' How is the woman related to Ramesh?
- Sister (Correct answer)
- Niece
- Cousin
- Daughter
Correct answer: Sister
Ramesh's grandmother's only child is Ramesh's parent. The woman is that parent's daughter, so she is Ramesh's sister.
Ramesh's grandmother has only one child, which is Ramesh's mother or father. The woman is the daughter of that single child, making her Ramesh's sister.
Question 2: A is the father of B. C is the daughter of A. D is the brother of E. E is the daughter of B. Who is the grandmother of D?
- A
- B
- C
- Cannot be determined (Correct answer)
Correct answer: Cannot be determined
D's parent is B (since D is brother of E, and E is B's daughter). B's mother is never mentioned, so D's grandmother cannot be determined.
D is brother of E. E is daughter of B, so D is also B's child. D's grandmother would be B's mother. A is B's father and C is A's daughter (so C is B's sibling). B's mother is never mentioned, so the answer cannot be determined.
Question 3: If X is the brother of Y, Y is the sister of Z, and Z is the son of W, then how is X related to W?
- Son (Correct answer)
- Daughter
- Son or Daughter
- Brother
Correct answer: Son
Z is son of W, so W is Z's parent. Y is sister of Z, so Y is W's child. X is brother of Y, so X is W's son (since X is male).
Z is son of W → W is Z's parent. Y is sister of Z → Y is also W's child. X is brother of Y → X is also W's child. X is male (brother), so X is W's son.
Question 4: Introducing a boy, a girl says, 'He is the son of the daughter of the father of my uncle.' How is the boy related to the girl?
- Brother (Correct answer)
- Nephew
- Uncle
- Son-in-law
Correct answer: Brother
Father of her uncle = her grandfather. Daughter of grandfather = her mother. Son of her mother = her brother.
Father of girl's uncle is her grandfather. Daughter of grandfather is either girl's mother or aunt. If daughter of grandfather = girl's mother, then son of mother = girl's brother. The boy is the girl's brother.
Question 5: In a family of six: A has two sons B and C. D is the wife of B. E is the daughter of D. F is the only brother of E. Who is F's paternal grandfather?
- A (Correct answer)
- B
- C
- D
Correct answer: A
E and F are children of B and D. B's father is A. Therefore F's father is B and F's paternal grandfather is A.
D is B's wife. E is D's daughter, so E is also B's daughter. F is E's only brother, so F is also B and D's son. F's paternal grandfather is B's father, which is A.
Question 6: Rahul's mother is the only daughter of Monika's father. How is Monika's husband related to Rahul?
- Father (Correct answer)
- Uncle
- Grandfather
- Brother
Correct answer: Father
Only daughter of Monika's father = Monika. So Monika is Rahul's mother. Monika's husband is Rahul's father.
Monika's father's only daughter = Monika. Therefore Monika is Rahul's mother. Monika's husband is Rahul's father.
AMCAT Logical Ability: Blood Relations 2
Pointing to a woman, Ramesh said, 'She is the daughter of the only child of my grandmother.' How is the woman related to Ramesh?