Daily Olympiad: Logical Reasoning - Blood Relations [20260609]

Solution

Correct: A

X and Y are brothers. M is married to Y, making her Y's wife and X's sister-in-law. N is the son of X. Since N is the son of Y's brother (X), he is Y's nephew. As M is Y's wife, she is also N's aunt via Y. Thus, N is M's nephew.

Solution

Correct: D

If P is Q's aunt, P is the sister of Q's parent. R is Q's grandparent, making R either the parent of P or the parent of Q's parent. Since R is Q's grandparent and P is Q's aunt, R must be P's parent. Thus, R is P's father or mother.

Solution

Correct: C

S and T are U's and V's parents, making them the grandparents of Y (V's daughter). W and X are U and V's brothers. Y is V's daughter, so Y is W's niece (as V is W's sister). W is the uncle of Y. Thus, Y is W's niece.