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。, \3 @5 N; c# c- A' N. 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) 2 ?7 S! x9 a% Q- y/ s6 O8 p3. Same method if is not equal on 2nd try.