put 3 balls on each side, 公仔箱論壇0 f7 n: Y7 @7 {$ H; w
if balance, we can prove that all 6 balls on the 天平 is normal, 5.39.217.77:8898) j9 C ~0 A; a! R' \& z$ |
if not balance, we can prove that the 6 balls outside the 天平 is normal.
* P% V* }) I; u$ ?5 Q1 K Xtvb now,tvbnow,bttvbthen use the proved-normal ball on one side and put the other ball on other side 公仔箱論壇: }# ^. L$ A/ D8 A0 D
to determine the abnormal is heavy and light |
發表於 2011-5-11 04:50 AM
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