put 3 balls on each side,
8 D4 P, R2 }3 P4 }4 C5.39.217.77:8898if balance, we can prove that all 6 balls on the 天平 is normal, & l) w0 E- R# H& G C& P
if not balance, we can prove that the 6 balls outside the 天平 is normal.公仔箱論壇- h/ [, i! g, n- P; Z- j1 L% A) g
then use the proved-normal ball on one side and put the other ball on other side 4 W2 w9 k1 \/ G7 G/ }2 N* o: h2 i
to determine the abnormal is heavy and light |