put 3 balls on each side,
3 C5 N6 Q9 W; u. r- U1 v( s+ b; n8 V) ptvb now,tvbnow,bttvbif balance, we can prove that all 6 balls on the 天平 is normal, 0 Z3 M' F- [% u0 S# u$ B# Y
if not balance, we can prove that the 6 balls outside the 天平 is normal.
+ i/ Y1 }0 B# C2 M% _* w! }tvb now,tvbnow,bttvbthen use the proved-normal ball on one side and put the other ball on other side 公仔箱論壇; ^% k4 |0 q7 [* J' L- }; z
to determine the abnormal is heavy and light |