put 3 balls on each side,
) e4 i q- O; j- Q公仔箱論壇if balance, we can prove that all 6 balls on the 天平 is normal, 5.39.217.77:88986 e8 s5 v& I" Q" d' ~
if not balance, we can prove that the 6 balls outside the 天平 is normal.
5 [% M& C6 R% I: }4 Y5.39.217.77:8898then use the proved-normal ball on one side and put the other ball on other side 4 U4 x/ X1 k6 \+ C7 A3 q P
to determine the abnormal is heavy and light |