1. 1st divide to half take the heavier outTVBNOW 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。$ w5 T5 i! _2 ? n
2. 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) ; v! n/ u- m: b& b- m5 J+ mtvb now,tvbnow,bttvb3. Same method if is not equal on 2nd try.