put 3 balls on each side,
% e# Z& A2 T2 i3 d) p9 h4 [tvb now,tvbnow,bttvbif balance, we can prove that all 6 balls on the 天平 is normal, www.tvboxnow.com0 x0 m2 H, |2 M
if not balance, we can prove that the 6 balls outside the 天平 is normal.公仔箱論壇& [6 y% s$ r0 _1 p8 ^
then use the proved-normal ball on one side and put the other ball on other side : A" h. i3 G% c9 f8 p4 B' E+ m0 V* T
to determine the abnormal is heavy and light |