A + B means A is the father 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 daughter of B.

If P ÷ R + Q, which of the following is true ?

Answer: D. P is the sister of Q
P ÷ R + Q means P is the daughter of R who is the father of Q i.e. P is the sister of Q.