put 3 balls on each side, ; ], \9 @* x2 P5 e
if balance, we can prove that all 6 balls on the 天平 is normal,
' U: a! |* R3 s# m* hif not balance, we can prove that the 6 balls outside the 天平 is normal.
+ K2 t! C+ _1 G6 ktvb now,tvbnow,bttvbthen use the proved-normal ball on one side and put the other ball on other side tvb now,tvbnow,bttvb Y) h( d) K* k6 [, j
to determine the abnormal is heavy and light |