1. 1st divide to half take the heavier out7 e- ~7 t3 q- H6 D/ c2 e( a3 D
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)公仔箱論壇. o/ s6 N5 \! j2 u8 O: B
3. Same method if is not equal on 2nd try.