put 3 balls on each side,
0 z3 @2 e: v I$ u- ~if balance, we can prove that all 6 balls on the 天平 is normal,
5 G0 e0 Y/ B* e$ `, A; i公仔箱論壇if not balance, we can prove that the 6 balls outside the 天平 is normal., I/ E/ l/ L: r2 {# Z7 N# j M
then use the proved-normal ball on one side and put the other ball on other side
5 p2 e* O# o! P# d3 M5.39.217.77:8898to determine the abnormal is heavy and light |