put 3 balls on each side,
& k1 n& y4 Z* G2 Q6 }5.39.217.76if balance, we can prove that all 6 balls on the 天平 is normal, 5.39.217.76# D' M, Q9 O) ~3 F; y
if not balance, we can prove that the 6 balls outside the 天平 is normal.
h0 M+ Y/ I+ w/ v" h: othen use the proved-normal ball on one side and put the other ball on other side 公仔箱論壇0 m" k, e1 F* H% X) J4 K8 N
to determine the abnormal is heavy and light |