put 3 balls on each side, , k3 {" t5 o1 Q: P2 @! ^' Q
if balance, we can prove that all 6 balls on the 天平 is normal, 公仔箱論壇, x) [! ]6 K' c$ S$ Y' u
if not balance, we can prove that the 6 balls outside the 天平 is normal.
9 H# G# z e8 B1 c& ^8 owww3.tvboxnow.comthen use the proved-normal ball on one side and put the other ball on other side
5 `( Q" i" T: y! T/ Q9 j公仔箱論壇to determine the abnormal is heavy and light |
發表於 2011-5-11 04:50 AM
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