In coded relation type questions, the relationships are represented by certain codes or symbols such as + , - , ÷ , × , * etc. Then relationships between certain persons, given in the form of these codes, are to be analysed.

A + B means A is the daughter of B ;
A - B means A is the husband of B ;
A x B means A is the brother of B.

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

A. R is the mother of P
B. R is the sister-in-law of P
C. R is the aunt of P
D. R is the mother-in-law of P
Answer: A . R is the mother of P

Justification: P + Q - R means P is the daughter of Q who is the husband of R i.e. R is P's mother.