alleryOf coins A–E,one is 1 g above normal,another 1 g below; others normal. Weights satisfy A+B>C+D; A+C=B+E; B>D. Which coin is light?
AA
BE
CD
DC
Answer & Solution
Correct answer: B. E
The first two weighings leave heavy-A/light-C or heavy-B/light-E; B>D selects light E.
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