put 3 balls on each side, 公仔箱論壇5 ^' V) m% o: c4 I$ p* O
if balance, we can prove that all 6 balls on the 天平 is normal,
. T9 v0 P1 U3 o) ?% M* jtvboxnow.comif not balance, we can prove that the 6 balls outside the 天平 is normal.
+ Q5 a5 a; A8 ?) E; `1 F) T9 jtvboxnow.comthen use the proved-normal ball on one side and put the other ball on other side TVBNOW 含有熱門話題,最新最快電視,軟體,遊戲,電影,動漫及日常生活及興趣交流等資訊。2 o7 D% N# H- E( w& Y
to determine the abnormal is heavy and light |