put 3 balls on each side,
, T( y3 f! m9 W+ l2 Q* rif balance, we can prove that all 6 balls on the 天平 is normal, 公仔箱論壇' m& z+ U L" N# n) K L
if not balance, we can prove that the 6 balls outside the 天平 is normal.
( J; L1 h8 F2 ~: F Athen use the proved-normal ball on one side and put the other ball on other side
' T3 E; \/ Y+ F8 xto determine the abnormal is heavy and light |