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。: u% m0 R3 W/ R
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) 3 X0 C/ { b' H. T) i- s5 n/ u- I* V5.39.217.77:88983. Same method if is not equal on 2nd try.