put 3 balls on each side,
# p; u; p: r9 m; ~: m4 f& ~4 [9 [if balance, we can prove that all 6 balls on the 天平 is normal, tvb now,tvbnow,bttvb$ W+ _' X& e* I) U( d
if not balance, we can prove that the 6 balls outside the 天平 is normal.
1 ?# b* N4 d$ n I, lwww3.tvboxnow.comthen use the proved-normal ball on one side and put the other ball on other side 5 s" y4 H' F) ?0 S
to determine the abnormal is heavy and light |