1. 1st divide to half take the heavier out 8 ^) q5 _& n: @, {, |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) : m' z7 d5 C9 m9 ?0 ]9 y: ^2 I- H3. Same method if is not equal on 2nd try.