put 3 balls on each side, 1 d" M8 l4 K, g; T! E7 D9 l7 P
if balance, we can prove that all 6 balls on the 天平 is normal,
M6 V# r: [ c. c) `* qtvb now,tvbnow,bttvbif not balance, we can prove that the 6 balls outside the 天平 is normal.
4 | b5 Y+ l! g; a1 o4 rthen use the proved-normal ball on one side and put the other ball on other side
3 n- T4 ?, a* ^* s( h2 m/ nwww2.tvboxnow.comto determine the abnormal is heavy and light |