put 3 balls on each side,
" c% B! X; c+ M6 L( D6 r" Zif balance, we can prove that all 6 balls on the 天平 is normal,
j6 ^* Y+ s4 d7 @9 U5 \6 V公仔箱論壇if not balance, we can prove that the 6 balls outside the 天平 is normal.8 |7 M' a4 \5 V5 g6 N
then use the proved-normal ball on one side and put the other ball on other side # a) k/ t [' P9 i- _
to determine the abnormal is heavy and light |