put 3 balls on each side, 5.39.217.763 n& r* y% F" |+ V
if balance, we can prove that all 6 balls on the 天平 is normal, tvb now,tvbnow,bttvb+ A* D; k+ N. q2 l! A# A& g0 E7 w
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。; t$ S+ D( N6 [4 j
then use the proved-normal ball on one side and put the other ball on other side
1 T( J+ _+ n9 w3 W公仔箱論壇to determine the abnormal is heavy and light |