1. 1st divide to half take the heavier out - m+ R& h2 C @8 U' n7 t2. 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)TVBNOW 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 U8 M. w; B e# g0 E& B2 h! w
3. Same method if is not equal on 2nd try.