put 3 balls on each side, 6 m$ [, W9 ^; z. m1 j2 p1 t& }
if balance, we can prove that all 6 balls on the 天平 is normal,
, z& K7 g$ s, i5 gwww3.tvboxnow.comif not balance, we can prove that the 6 balls outside the 天平 is normal.公仔箱論壇$ M& \: }% x& o3 E) {5 q
then use the proved-normal ball on one side and put the other ball on other side
. i" O& F& [) ~4 _www3.tvboxnow.comto determine the abnormal is heavy and light |