put 3 balls on each side,
0 }5 F( P4 S, P6 z公仔箱論壇if balance, we can prove that all 6 balls on the 天平 is normal, 5.39.217.77:88984 L% p$ ]1 Q/ ~ A3 ~& J) \3 z4 S8 f. `
if not balance, we can prove that the 6 balls outside the 天平 is normal.. m, a3 p% I. `% Q ~, z+ o4 S* P
then use the proved-normal ball on one side and put the other ball on other side
* {' d+ J+ U- M2 i+ L+ n5.39.217.77:8898to determine the abnormal is heavy and light |