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PUZZLE CLASSIC #286

Six Glasses Problem
Six Glasses Problem

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Today's Puzzle

Six Glasses Problem

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Six Glasses Problem
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In...
...moves

Place 6 glasses on a table - 3 up, 3 down. Take any pair of glasses and invert them. If you continue to invert the pairs as long as you like, in how many moves would you end up with all six glasses upright?