put 3 balls on each side,
( _+ u: \# Y, K( R" @ Y" u6 P" L5.39.217.77if balance, we can prove that all 6 balls on the 天平 is normal,
, {9 p9 T4 V( ~( j( k" @if not balance, we can prove that the 6 balls outside the 天平 is normal.* ^: s" \6 P3 b! `" o$ G% p) T
then use the proved-normal ball on one side and put the other ball on other side
8 l+ `; u8 Q9 f+ ?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。to determine the abnormal is heavy and light |