put 3 balls on each side,
8 n% [4 e* s, ?7 hif balance, we can prove that all 6 balls on the 天平 is normal,
9 Y A. ?+ q. _7 X( Nif not balance, we can prove that the 6 balls outside the 天平 is normal.tvb now,tvbnow,bttvb' X& L8 g7 {+ `) H
then use the proved-normal ball on one side and put the other ball on other side
; ~+ V& h4 O6 w oto determine the abnormal is heavy and light |