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    Question

    In a certain code language, ‘A + B’ means

    ‘A is the mother of B’; ‘A – B’ means ‘A is the wife of B’; ‘A × B’ means ‘A is the father of B’ and ‘A ÷ B’ means ‘A is the sister of B’. Based on the above, how is P related to T if ‘P + Q − R × S ÷ T’?
    A Mother’s mother Correct Answer Incorrect Answer
    B Mother’s sister Correct Answer Incorrect Answer
    C Father’s mother Correct Answer Incorrect Answer
    D Father’s sister Correct Answer Incorrect Answer

    Solution

    • P is mother of Q → P → Q

    • Q is wife of R → R → Q (husband)

    • R is father of S → R → S

    • S is sister of T → S → T

    Now trace P → T :

    • P → Q → R → S → T

    • Relationships:

    1. P is mother of Q

    2. Q is wife of R → Q and R are married

    3. R is father of S → R + Q = parents of S

    4. S is sister of T → S and T have the same parents

    • So S and T are siblings (children of R and Q)

    • P is mother of Q, so P is mother-in-law of R , grandmother of S

    • Therefore, P is grandmother of S , and since S and T are siblings, P is also grandmother of T

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