put 3 balls on each side, 公仔箱論壇: }; G7 Y; u) u1 ?
if balance, we can prove that all 6 balls on the 天平 is normal, - p5 J# d0 f( i; T
if not balance, we can prove that the 6 balls outside the 天平 is normal.公仔箱論壇7 W3 `- p8 g. w/ N2 ~7 R
then use the proved-normal ball on one side and put the other ball on other side - p2 g, O8 w- I- @) z6 b2 b3 S2 T! b
to determine the abnormal is heavy and light |
發表於 2011-5-11 04:50 AM
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