1. 1st divide to half take the heavier out u- h6 s4 h- w# m' S z2. 2nd take 4 balls out of 5 divide 2 groups to get the heavier out. (if is equal thn the remain is the one u looking for) * Y* S3 u l3 f0 Q5 v' p iTVBNOW 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。3. Same method if is not equal on 2nd try.