In a family of six members P, Q, R, S, T, and U, there are two males and four females. P is a teacher. Q is the sister of R. S is the mother of T. U is the father of Q. Who is the male member of the family?
Answer: D. U
Since U is the father of Q and there are only two males, U must be one of the males. P is a teacher but not necessarily male.