put 3 balls on each side, & i9 q8 n4 X/ {5 e( @
if balance, we can prove that all 6 balls on the 天平 is normal,
& G ]+ ?. A1 P6 i6 h! l- |if not balance, we can prove that the 6 balls outside the 天平 is normal.
) Q! a E, }$ Y' d( Ltvb now,tvbnow,bttvbthen use the proved-normal ball on one side and put the other ball on other side 5.39.217.761 `% ~2 x) ^3 l/ [3 i6 Q
to determine the abnormal is heavy and light |