第1次,稱12隻球,天平兩側各6隻。第2 and 3次稱6隻球,天平兩側各3隻。You now fingure out the defect ball is lighter or heavier. 第4次稱2隻球,天平兩側各一隻. So total 4 times.
第1次,稱12隻球,天平兩側各6隻。第2 and 3次稱6隻球,天平兩側各3隻。You now fingure out the defect ball is lighter or heavier. 第4次稱2隻球,天平兩側各一隻. So total 4 times.
• 回複:回複:回應392, 我出一道我認為,極好的選拔天才智力題,(很多人可能做過),無需數學 -smallking- ♂ (18 bytes) () 12/31/2012 postreply 07:17:08
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