put 3 balls on each side, 公仔箱論壇9 u4 \6 P3 ?- {
if balance, we can prove that all 6 balls on the 天平 is normal,
/ V$ J @1 D- g5.39.217.77:8898if not balance, we can prove that the 6 balls outside the 天平 is normal.- g% }' x! L+ {$ ~# y$ w
then use the proved-normal ball on one side and put the other ball on other side
5 V, Y( E4 m6 |9 f5.39.217.77:8898to determine the abnormal is heavy and light |