1. 1st divide to half take the heavier out公仔箱論壇; i$ ^! S+ W- ^8 ?
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)tvb now,tvbnow,bttvb# b4 D1 j# Z/ w
3. Same method if is not equal on 2nd try.