put 3 balls on each side, ! s7 U4 I8 D9 ~0 k6 V m" w# Y+ ?if balance, we can prove that all 6 balls on the 天平 is normal, " [7 P/ i. R F4 k& ~0 O% hwww2.tvboxnow.comif not balance, we can prove that the 6 balls outside the 天平 is normal. " @: f5 }6 }8 ithen use the proved-normal ball on one side and put the other ball on other side 1 `8 }5 T5 g0 ` ]4 }$ D) \% ^
to determine the abnormal is heavy and light
發表於 2011-5-11 04:50 AM
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