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

C. COUSIN

If X * Y means X is the mother of Y, and Y + Z means Y is the brother of Z, what is the relationship of X to Z?

C. MOTHER

X is the father of Y. Z is the mother of Y. How is Z related to X?

B. WIFE

A is the sister of B. C is the brother of A. How is C related to B?

A. BROTHER

A is the grandmother of B. C is the mother of B. How is C related to A?

A. DAUGHTER