1. 1st divide to half take the heavier out 7 o& f. X4 E0 Gtvb 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)公仔箱論壇, z' P: q5 w+ o" o+ a a8 M
3. Same method if is not equal on 2nd try.