Pointing to a girl in the photograph, Amar said, "Her mother`s brother is the only son of my mother's father." How is the girl`s mother related to Amar ?

C. AUNT

A + B means A is the son of B;
A - B means A is the wife of B;
A x B means A is the brother of B;
A ÷ B means A is the mother of B; and
A = B means A is the sister of B.
What does P = R ÷ Q mean ?

A. P IS THE AUNT OF Q.

A family consists of six members P, Q, R, X, Y and Z. Q is the son of R but R is not mother of Q. P and R are a married couple. Y is the brother of R. X is the daughter of P. Z is the brother of P. Who is the father of Q ?

A. R

Pointing to a man in a photograph, a woman said, "His brother`s father is the only son of my grandfather.' How is the woman related to the man in the photograph?

C. SISTER

Introducing a man, a woman said, "His wife is the only daughter of my father."
How is that man related to the woman ?

D. HUSBAND