put 3 balls on each side,
- V9 y$ T5 B, [tvb now,tvbnow,bttvbif balance, we can prove that all 6 balls on the 天平 is normal,
- L8 Z+ `) N7 c( R+ v) \% T: Y公仔箱論壇if not balance, we can prove that the 6 balls outside the 天平 is normal.
6 J- K0 s+ r0 P6 G' E- [5 B, q7 @公仔箱論壇then use the proved-normal ball on one side and put the other ball on other side
4 L0 b3 ~+ z- d3 k. ` Q' Gto determine the abnormal is heavy and light |