put 3 balls on each side,
6 E& g6 O4 e& N$ Q# X, I' ]+ CTVBNOW 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 balance, we can prove that all 6 balls on the 天平 is normal,
) ?1 T* ?6 N1 |. ^: s3 F4 e4 pif not balance, we can prove that the 6 balls outside the 天平 is normal.
1 p8 ?, R$ i; I- p- }! b( v* W1 uthen use the proved-normal ball on one side and put the other ball on other side
3 C6 H) K7 ]( |( S# o& A% W$ yto determine the abnormal is heavy and light |