put 3 balls on each side,
( K+ c: m& Q1 M! j$ y2 E2 ~if balance, we can prove that all 6 balls on the 天平 is normal, 3 I. H* i# P, L2 v" \
if not balance, we can prove that the 6 balls outside the 天平 is normal.公仔箱論壇' E5 _$ s5 `8 S! N
then use the proved-normal ball on one side and put the other ball on other side www3.tvboxnow.com; h' _- m7 f% H. s: `/ c- `
to determine the abnormal is heavy and light |