There is a family of five members: K, L, M, N and O. Among them, there is one married couple. O is unmarried and is the brother of K, N is the sister of O, M is the only married female and the mother of N. L and O are the only males in the group. Who is the father of K?
Answer & explanation
Correct answer: option 4
The correct answer is Option (4) → L
The question names the only two males, L and O, and the only married female, M; the one married couple must be a man and a woman, so it is found from these facts first.
L and O are the only males, so K, M and N are females.
The married couple needs a husband:
O is unmarried, so the husband is L.
The wife is the only married female, M: L and M are the married couple.
O is the brother of K, and N is the sister of O, so K, N and O are siblings.
M is the mother of N:
So she is the mother of N’s brother O and sister K as well.
M’s husband L is therefore the father of K.
