M is the daughter of N. O is the son of N. How is O related to M?

A. BROTHER

If J ÷ K means J is the daughter of K, and K - L means K is the sister of L, what is the relationship between J and L?

B. AUNT

If P * Q means P is the mother of Q, P + Q means P is the father of Q, and P - Q means P is the sister of Q, what is the relationship of R if P * R + Q?

A. R IS THE DAUGHTER OF Q

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

A. GRANDSON/GRANDDAUGHTER

X is the father of Y. Y is married to Z. Z has a brother W. How is W related to X?

C. BROTHER-IN-LAW