1. 1st divide to half take the heavier out公仔箱論壇. f# x6 @" v& s# J, j9 [
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)tvboxnow.com9 G; E, W5 ? C2 |0 W: c+ T1 j5 Y0 r
3. Same method if is not equal on 2nd try.