put 3 balls on each side,
7 `& u9 }8 l' |: U4 P5 A* \$ Mtvb now,tvbnow,bttvbif balance, we can prove that all 6 balls on the 天平 is normal, 公仔箱論壇0 D, e; X2 L, O* `% z
if not balance, we can prove that the 6 balls outside the 天平 is normal.tvb now,tvbnow,bttvb. m; m% b" I; z1 \4 v
then use the proved-normal ball on one side and put the other ball on other side
$ ^# O9 m: J& m$ G9 y& rtvb now,tvbnow,bttvbto determine the abnormal is heavy and light |