1. 1st divide to half take the heavier out
, O' k; F* E9 v. u1 p% ctvb now,tvbnow,bttvb2. 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)
/ o# N* j3 H. j s |* z6 ~& m公仔箱論壇3. Same method if is not equal on 2nd try. |