Blood Relations Questions

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 ?

If 'A + B' means 'A is father of B', 'A – B' means 'A is mother of B', 'A * B' means 'A is brother of B' and 'A % B' means 'A is sister of B', then how is Q related toS in 'P + Q * R – S'?

Pointing to a woman, a girl says,"She is mother of the only child of my father-in-law." How is the woman related to the girl?

All the six members of a family A, B, C, D, E and F are travelling together. B is the son of C but C is not the mother of B. A and C are a married couple. E is the brother of C. D is the daughter of A. F is the brother of B.  Which of the following is a pair of females ? 

Introducing a man to her husband, a woman said, This brother's father is the only son of my grandfather." How is the woman related to his man ? 

A is B's brother, C is A's mother, D is C's father, F is A's son. How is A related to F's child?

Mohan said 'This girl is the wife of grand­son of my mother'. How is Mohan related to that girl?

A man pointing to a lady says, “Her brother is the father of my only son's sister.” How is that lady related to the man ?