If A + B means A is the brother of B, A - B means A is the sister of B, and A × B means A is the father of B, what is the relationship of C if A + B × C?

C. C IS A'S SON

If A is the brother of B, and B is the sister of C, how is A related to C?

A. BROTHER

P is the uncle of Q. R is the sister of Q. How is P related to R?

C. UNCLE

D is the mother of E. F is the brother of D. How is F related to E?

A. UNCLE

In a coded relation, if M + N means M is the daughter of N, M - N means M is the son of N, and M × N means M is the grandfather of N, what is the relationship of O if M + O - N?

A. O IS THE SON OF N