put 3 balls on each side,
5 g, E) I) J+ ?# s0 oif balance, we can prove that all 6 balls on the 天平 is normal, tvb now,tvbnow,bttvb) K* H; \# q! n/ t5 \
if not balance, we can prove that the 6 balls outside the 天平 is normal.5.39.217.77, ^" h3 E7 \3 `2 k
then use the proved-normal ball on one side and put the other ball on other side
4 E! Q/ F& n- }; M7 qto determine the abnormal is heavy and light |