put 3 balls on each side,
) M a4 H3 i. Qif balance, we can prove that all 6 balls on the 天平 is normal, ' z$ I5 e+ t" S+ L+ J
if not balance, we can prove that the 6 balls outside the 天平 is normal.TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。2 q' Z9 T3 E; K( Q' A9 e- C' c a
then use the proved-normal ball on one side and put the other ball on other side ! {$ |4 \9 ^# Y [" f0 O
to determine the abnormal is heavy and light |