D is the father of E and F. G is the sister of E. How is G related to F?

A. SISTER

M is the grandmother of N. O is the mother of N. How is O related to M?

A. DAUGHTER

In a coded relation, if P × Q means P is the mother of Q, P ÷ Q means P is the son of Q, and P + Q means P is the sister of Q, what is the relationship of R if P × R ÷ Q means P is the mother of R and R is the son of Q?

B. R IS THE SON OF P

If X - Y means X is the sister of Y, Y + Z means Y is the brother of Z, and Z × W means Z is the father of W, what is the relationship of W to X if the expression is X - Y + Z × W?

D. W IS THE SON OF X

If A is the brother of B and B is the sister of C, what is the relationship of C to A?

B. BROTHER