put 3 balls on each side,
/ f. Q4 s6 p M$ K公仔箱論壇if balance, we can prove that all 6 balls on the 天平 is normal, - V8 o% z+ u5 t4 l$ c
if not balance, we can prove that the 6 balls outside the 天平 is normal.公仔箱論壇: Z4 Z3 J# s+ ?% }
then use the proved-normal ball on one side and put the other ball on other side tvboxnow.com9 p+ w4 S- p' x/ y( e* x) m
to determine the abnormal is heavy and light |