put 3 balls on each side,
9 `6 o3 z& u" r' stvb now,tvbnow,bttvbif balance, we can prove that all 6 balls on the 天平 is normal, tvb now,tvbnow,bttvb- Y# u$ R" h( @9 m1 m& Z) C
if not balance, we can prove that the 6 balls outside the 天平 is normal.
3 r- q8 K& ]! B" F; Athen use the proved-normal ball on one side and put the other ball on other side
4 r+ w3 g/ ^# D1 t公仔箱論壇to determine the abnormal is heavy and light |