put 3 balls on each side,
# l% a9 {7 g+ h, \tvb now,tvbnow,bttvbif balance, we can prove that all 6 balls on the 天平 is normal,
+ q3 P N! v* Q* L4 g' j4 ~if not balance, we can prove that the 6 balls outside the 天平 is normal.tvb now,tvbnow,bttvb/ @. x8 w) g( F' h$ b
then use the proved-normal ball on one side and put the other ball on other side
% Y: h1 S, `5 r& _2 stvb now,tvbnow,bttvbto determine the abnormal is heavy and light |