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Previous Year Question (PYQs)

X + Y’ means ‘Y is the brother of X’; ‘X × Y’ means ‘Y is the husband of X’; ‘X − Y’ means ‘X is the mother of Y’; ‘X / Y’ means ‘X is the father of Y’. Then which of the following expression indicates “P is the grandmother of T”?




Solution

$P \times Q / R - T$ : - $P \times Q$ ⇒ Q is husband of P ⇒ P is wife of Q. - $Q / R$ ⇒ Q is father of R ⇒ R is child of (Q,P) ⇒ P is mother of R. - $R - T$ ⇒ R is mother of T. Therefore P (mother of R) is **grandmother** of T.

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