put 3 balls on each side,
' i7 c# m# B4 W1 Q% C c! \if balance, we can prove that all 6 balls on the 天平 is normal, / w" V" A5 A8 a( [6 ?
if not balance, we can prove that the 6 balls outside the 天平 is normal. U, c% [) T& \
then use the proved-normal ball on one side and put the other ball on other side 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。# B" [2 S4 e9 [ @. k$ F" e' L
to determine the abnormal is heavy and light |