If P ÷ Q means P is the father of Q, and Q - R means Q is the sister of R, what is the relationship between P and R?

A. FATHER

If M + N means M is the sister of N, and N * O means N is the mother of O, what is the relationship between M and O?

A. AUNT

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

B. UNCLE

If A is the brother of B, and B is the sister of C, how is A related to C?

A. BROTHER

If D is the mother of E and E is the father of F, what is D's relationship to F?

A. GRANDMOTHER