put 3 balls on each side, 2 l: Q9 K+ v7 i8 a) g
if balance, we can prove that all 6 balls on the 天平 is normal,
1 p# c3 ^0 _* g4 |6 PTVBNOW 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。if not balance, we can prove that the 6 balls outside the 天平 is normal.5.39.217.776 S+ K8 h3 a3 @" k% m
then use the proved-normal ball on one side and put the other ball on other side : L& C s& Q% L( P7 U' \4 y
to determine the abnormal is heavy and light |