You have 12 balls. 11 balls are identified.



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送交者: 笑笑 于 2005-4-15, 01:07:41:

1 ball weight either more or less than others, but you don't know. you have a double bean balance scale (not tirble). Only use 3 times. You must identify the ball that is different. Tell me if it werights more or less




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