put 3 balls on each side, www.tvboxnow.com2 T% Q$ S6 D$ G3 m" x3 l, i( x
if balance, we can prove that all 6 balls on the 天平 is normal, www.tvboxnow.com3 {7 T: }: P8 [" n
if not balance, we can prove that the 6 balls outside the 天平 is normal.tvb now,tvbnow,bttvb, H5 G' S( [; ?# g
then use the proved-normal ball on one side and put the other ball on other side
2 }) \3 F( B5 J' b/ p, h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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