put 3 balls on each side, / c2 G. \6 b/ h5 a( o9 D3 F2 f
if balance, we can prove that all 6 balls on 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。) I3 K# s. x. Y! C! Y/ y0 N/ F+ s
if not balance, we can prove that the 6 balls outside the 天平 is normal.tvb now,tvbnow,bttvb& q4 G. e2 |$ G- |; u) s
then use the proved-normal ball on one side and put the other ball on other side ! ~ O9 Z2 T, a& F$ o1 e
to determine the abnormal is heavy and light |