put 3 balls on each side, 公仔箱論壇- v4 i: ] r( ^9 B1 Y
if balance, we can prove that all 6 balls on the 天平 is normal,
$ Z; [6 B3 v1 g0 I# v/ a; S0 G6 k7 Awww2.tvboxnow.comif not balance, we can prove that the 6 balls outside the 天平 is normal.
6 S5 {/ K( U( Cwww2.tvboxnow.comthen use the proved-normal ball on one side and put the other ball on other side www2.tvboxnow.com* S* r) w; y$ {# p$ @$ _
to determine the abnormal is heavy and light |