put 3 balls on each side,
# L3 H* A7 r3 C: jwww3.tvboxnow.comif balance, we can prove that all 6 balls on the 天平 is normal,
2 T. X8 x2 C0 t4 _" @8 {8 oif not balance, we can prove that the 6 balls outside the 天平 is normal.
; e' b0 H! G. V4 ]0 _then use the proved-normal ball on one side and put the other ball on other side + {: y" k q7 J# V$ R; e3 x
to determine the abnormal is heavy and light |