1. 1st divide to half take the heavier out % I+ u; W+ V6 H5 t# A1 g1 W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) ! w: y2 |' _4 I) s3. Same method if is not equal on 2nd try.