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PUZZLE CLASSIC #186

9 Weights
9 Weights

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Today's Puzzle

9 Weights

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9 Weights
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1st weighing
2nd weighing

Of 9 identical weights, 8 are the same, while one (a counterfeit) is lighter than the others. The counterfeit can be found in two weighings on a plain balance with no markings on it. How many weights are put on both pans during the 1st weighing, and how many are put during the 2nd weighing?