put 3 balls on each side,
1 J/ u6 \ N( X; w5.39.217.77:8898if balance, we can prove that all 6 balls on the 天平 is normal, 公仔箱論壇6 i6 ?' B5 g0 x5 Y s* Z! T' N' o* M
if not balance, we can prove that the 6 balls outside the 天平 is normal.
8 A& @# j% E# S, y) Rthen use the proved-normal ball on one side and put the other ball on other side
8 v" r5 c3 T9 y, K: U/ g! bto determine the abnormal is heavy and light |