put 3 balls on each side, 公仔箱論壇( |$ l: M. }" k- Z8 g7 i5 |- Y$ Y$ z
if balance, we can prove that all 6 balls on the 天平 is normal,
H& U/ }; e5 e5 {1 Jwww3.tvboxnow.comif not balance, we can prove that the 6 balls outside the 天平 is normal.
' U7 r Y+ B) A5 z3 e/ Ltvb now,tvbnow,bttvbthen use the proved-normal ball on one side and put the other ball on other side " x! _: O; M- m7 ~$ a
to determine the abnormal is heavy and light |