put 3 balls on each side,
$ J! p1 @6 N0 ^+ h公仔箱論壇if balance, we can prove that all 6 balls on the 天平 is normal,
1 I; O" g* b/ m# M% |" L( b+ A1 n# ^os.tvboxnow.comif not balance, we can prove that the 6 balls outside the 天平 is normal./ l Z: R7 x; y; j8 k1 Z1 ^8 V
then use the proved-normal ball on one side and put the other ball on other side
7 F5 _3 Q" e4 D' \1 z$ E2 sos.tvboxnow.comto determine the abnormal is heavy and light |