In a certain code, ‘A + B’ means ‘A is the husband of B’; ‘A – B’ means ‘A is the daughter of B’; ‘A × B’ means ‘A is the father of B’; ‘A ÷ B’ means ‘A is the brother of B’. Which of the following expressions means that P is the granddaughter of S?
Correct answer D. P - Q + R - S
Explanation
In P - Q + R - S, P is the daughter of Q, Q is the husband of R, R is the daughter of S, so P is the granddaughter of S. The other expressions make P the niece, great-granddaughter or grandfather of S.
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