put 3 balls on each side,
* o' Z# u' d: c6 }, ~9 E5 F) B公仔箱論壇if balance, we can prove that all 6 balls on the 天平 is normal,
- c3 f$ F+ `' U1 aif not balance, we can prove that the 6 balls outside the 天平 is normal.$ b' _5 f" M7 s1 [, E
then use the proved-normal ball on one side and put the other ball on other side : {; k+ Z. ~' H4 T
to determine the abnormal is heavy and light |