put 3 balls on each side, 公仔箱論壇$ V @- ? T0 P: @4 |; A
if balance, we can prove that all 6 balls on the 天平 is normal,
/ o' z* [ B; I$ y0 y @tvb now,tvbnow,bttvbif not balance, we can prove that the 6 balls outside the 天平 is normal.
6 f( Y; }! Z5 I5 {+ y% X* ^ Ztvb now,tvbnow,bttvbthen use the proved-normal ball on one side and put the other ball on other side tvb now,tvbnow,bttvb; M' S& k6 W. [- C, M: K$ F
to determine the abnormal is heavy and light |