Four boxes are labelled P, Q, R and S. P is heavier than Q. R is lighter than Q. S is heavier than P. Which is the lightest box?
Answer and explanation
Correct answer: B. R
- Step 1: Chain the comparisons. Step 2. S > P > Q > R, so the lightest is R. Answer: R. Why not the others: Q is heavier than R, P is heavier than Q and S is the heaviest.
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