put 3 balls on each side, tvboxnow.com0 {5 O0 Y( l4 h- q% t: q' l% H
if balance, we can prove that all 6 balls on the 天平 is normal,
9 h6 y) K8 c6 Y* T2 U/ R) }2 Y, ^公仔箱論壇if not balance, we can prove that the 6 balls outside the 天平 is normal.公仔箱論壇% X( o& F, ^2 |2 e/ v4 K5 p
then use the proved-normal ball on one side and put the other ball on other side # ~( H+ q* i" _4 r% o, E% g
to determine the abnormal is heavy and light |