put 3 balls on each side,
6 Q3 l8 p" u- P O! m/ {' Xtvb now,tvbnow,bttvbif balance, we can prove that all 6 balls on the 天平 is normal,
* w; [( U* I! i0 _5.39.217.76if not balance, we can prove that the 6 balls outside the 天平 is normal.
* K1 h& r, b9 N J t" ]3 I: }tvb now,tvbnow,bttvbthen use the proved-normal ball on one side and put the other ball on other side 公仔箱論壇" G( k' n" J9 A0 L* T
to determine the abnormal is heavy and light |