put 3 balls on each side,
- ^9 z3 J0 T5 Q( S/ {: i& lif balance, we can prove that all 6 balls on the 天平 is normal,
& ^+ w* x! O7 {+ v7 E. btvb now,tvbnow,bttvbif not balance, we can prove that the 6 balls outside the 天平 is normal.
8 W0 }' ]- n9 s( Zthen use the proved-normal ball on one side and put the other ball on other side
, T) z2 z: W4 o4 Z! L) ~+ f9 x2 N) utvb now,tvbnow,bttvbto determine the abnormal is heavy and light |