put 3 balls on each side, tvb now,tvbnow,bttvb5 Y) D' z! e# x3 U# s8 V
if balance, we can prove that all 6 balls on the 天平 is normal,
# H5 B; D3 y9 n, F( x7 n% Cif not balance, we can prove that the 6 balls outside the 天平 is normal.4 J2 @0 A" {. q- H+ W# \+ N2 g& E7 t
then use the proved-normal ball on one side and put the other ball on other side
" P& u* |3 }8 W m' z& H, o5.39.217.76to determine the abnormal is heavy and light |