1. 1st divide to half take the heavier out , X3 g. N! o4 uTVBNOW 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. 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) % s) \; g J) H% l0 ?1 ^7 ?: Z公仔箱論壇3. Same method if is not equal on 2nd try.