put 3 balls on each side, ( A$ e8 o. K4 e! r$ C
if balance, we can prove that all 6 balls on the 天平 is normal, 公仔箱論壇/ c+ K+ \$ w, c
if not balance, we can prove that the 6 balls outside the 天平 is normal.
& h& @. l$ I; q& v# H5.39.217.77then use the proved-normal ball on one side and put the other ball on other side
6 g% P4 @$ T. Q% xto determine the abnormal is heavy and light |