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 ?
Answer: A. P is the aunt of Q.
P = R ÷ Q means P is the sister of R who is the mother of Q i.e. P is the aunt of Q. So, the answer is (a).