第1次,称12只球,天平两侧各6只。第2 and 3次称6只球,天平两侧各3只。You now fingure out the defect ball is lighter or heavier. 第4次称2只球,天平两侧各一只. So total 4 times.
第1次,称12只球,天平两侧各6只。第2 and 3次称6只球,天平两侧各3只。You now fingure out the defect ball is lighter or heavier. 第4次称2只球,天平两侧各一只. So total 4 times.
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回复:回复:回应392, 我出一道我认为,极好的选拔天才智力题,(很多人可能做过),无需数学
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12/31/2012 postreply
07:17:08
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