1. 1st divide to half take the heavier out + w% N6 ~, M: l0 c/ I$ P9 ^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) 3 @/ H' h( m7 l* G3 z) h. S3. Same method if is not equal on 2nd try.