put 3 balls on each side, os.tvboxnow.com2 z; C2 t; z' n# h9 K8 @
if balance, we can prove that all 6 balls on the 天平 is normal, tvb now,tvbnow,bttvb3 X' F( ]6 ?: G+ ~) B; R7 p/ e" d
if not balance, we can prove that the 6 balls outside the 天平 is normal.公仔箱論壇0 s- N5 J3 x0 H3 J3 v8 \9 s
then use the proved-normal ball on one side and put the other ball on other side 2 Q+ G m" ]" z2 P3 w" ~+ d
to determine the abnormal is heavy and light |