1. 1st divide to half take the heavier outtvb now,tvbnow,bttvb' b) a- A4 V# K$ Y# f, _/ b. U8 w
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) 7 f$ D/ N, Z: A/ T公仔箱論壇3. Same method if is not equal on 2nd try.