put 3 balls on each side, 5.39.217.76: W' ^. v* e' I, c
if balance, we can prove that all 6 balls on the 天平 is normal, 5 @# V- z% c% H! ^
if not balance, we can prove that the 6 balls outside the 天平 is normal.公仔箱論壇1 v4 F: X: K* S! ?: [8 j4 ~
then use the proved-normal ball on one side and put the other ball on other side tvb now,tvbnow,bttvb" Q0 e% ^/ t& r; X& l* m$ i
to determine the abnormal is heavy and light |
發表於 2011-5-11 04:50 AM
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