put 3 balls on each side,
, ?; |5 t7 U. Z) L& Kif balance, we can prove that all 6 balls on the 天平 is normal,
- a* V4 a. {4 q7 B# H公仔箱論壇if not balance, we can prove that the 6 balls outside the 天平 is normal.
/ y. u& t7 Q1 z; }then use the proved-normal ball on one side and put the other ball on other side
, o" n n# b+ rto determine the abnormal is heavy and light |