put 3 balls on each side, tvb now,tvbnow,bttvb( Q; q2 s$ t/ ?4 C
if balance, we can prove that all 6 balls on the 天平 is normal,
7 U; Y& i+ r" ^& a7 T: X0 }( Cwww2.tvboxnow.comif not balance, we can prove that the 6 balls outside the 天平 is normal.
% G# @1 ^, L; l7 G7 K, ?then use the proved-normal ball on one side and put the other ball on other side
- J! h$ ~* u% g$ f1 b- P/ \tvb now,tvbnow,bttvbto determine the abnormal is heavy and light |