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 + C - B?
If X - Y means X is the sister of Y, X + Y means X is the brother of Y, and X × Y means X is the uncle of Y, what is the relationship of Z if X - Z + Y?
In a coded relationship, if M + N means M is the sister of N, M - N means M is the brother of N, and M × N means M is the mother of N, what is the relationship of O if M + O × N?