put 3 balls on each side, 2 v) O5 o4 T4 N
if balance, we can prove that all 6 balls on the 天平 is normal,
- @1 s) w5 r& W1 s4 p: _tvb now,tvbnow,bttvbif not balance, we can prove that the 6 balls outside the 天平 is normal.5 y, A/ j p8 Y% i7 J
then use the proved-normal ball on one side and put the other ball on other side
! q! A2 r& t# j3 h7 d公仔箱論壇to determine the abnormal is heavy and light |