put 3 balls on each side,
+ b4 u2 h6 D/ i; o% ]: m5 Vtvb now,tvbnow,bttvbif balance, we can prove that all 6 balls on the 天平 is normal, tvb now,tvbnow,bttvb$ R8 b( Z' X- N! N& ]
if not balance, we can prove that the 6 balls outside the 天平 is normal.公仔箱論壇( S& V( {6 R0 q
then use the proved-normal ball on one side and put the other ball on other side
# j) q1 ]0 b) `" ]# [: c公仔箱論壇to determine the abnormal is heavy and light |