In a certain code, ‘A + B’ means ‘A is the son of B’; ‘A – B’ means ‘A is the wife of B’; ‘A × B’ means ‘A is the brother of B’; ‘A ÷ B’ means ‘A is the husband of B’. Which of the following expressions means that P is the grandson of S?
Correct answer D. P + Q - R + S
Explanation
In P + Q - R + S, P is the son of Q, Q is the wife of R, R is the son of S, so P is the grandson of S. The other expressions make P the nephew, daughter-in-law or son of S.
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