fellatioho

put 3 balls on each side, 7 x2 r+ s' [. b$ o" F
if balance, we can prove that all 6 balls on the 天平 is normal,
* [9 P% q1 ~9 Y2 S% nif not balance, we can prove that the 6 balls outside the 天平 is normal.
* u# F( i( K8 V公仔箱論壇then use the proved-normal ball on one side and put the other ball on other side
9 M& y8 t/ v9 T& I- d& E* F( j0 eto determine the abnormal is heavy and light