1. 1st divide to half take the heavier out ) i6 c1 ]% ]6 ]7 m# N+ F公仔箱論壇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) ! Q: n0 a7 e7 O$ S* l3. Same method if is not equal on 2nd try.