M is the father of N. N has a son O. How is O related to M?

A. GRANDSON

In a coded relationship, 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 daughter of Q, what is the relationship of R if P × R ÷ Q means P is the mother of R and R is the father of Q?

B. R IS Q'S SON

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

A. SISTER

X is the father of Y. Y is married to Z. What is Z's relation to X?

B. DAUGHTER-IN-LAW

P is the uncle of Q. Q is the daughter of R. If R is P's brother, how is R related to Q?

A. FATHER