put 3 balls on each side,
6 A9 g3 V4 m% ]5 I5 Z' r, Nif balance, we can prove that all 6 balls on the 天平 is normal, % P8 G1 Z8 p9 j m
if not balance, we can prove that the 6 balls outside the 天平 is normal.www3.tvboxnow.com; H" R/ R9 H& f& u
then use the proved-normal ball on one side and put the other ball on other side % i1 U! U5 _; A
to determine the abnormal is heavy and light |