put 3 balls on each side,
$ F$ R: M/ o0 A1 H3 g, x) Jif balance, we can prove that all 6 balls on the 天平 is normal, 公仔箱論壇+ t0 J0 l) n% q& W& V1 q
if not balance, we can prove that the 6 balls outside the 天平 is normal.
+ ^+ b; Q3 c4 K; z, Wthen use the proved-normal ball on one side and put the other ball on other side
, V/ }* u" C8 m4 Lwww3.tvboxnow.comto determine the abnormal is heavy and light |