put 3 balls on each side,
" y# G. R X- |9 R+ g5 m公仔箱論壇if balance, we can prove that all 6 balls on the 天平 is normal,
& ^" Z5 B' l0 i; o6 dTVBNOW 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.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。. U2 Y \5 v/ a. `" o+ J5 \
then use the proved-normal ball on one side and put the other ball on other side
! c' Y2 L Q- i6 x$ U' Qto determine the abnormal is heavy and light |