1. 1st divide to half take the heavier out 3 f) A9 X7 v- A0 z( t0 b. U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)tvb now,tvbnow,bttvb, ]8 x c6 a5 ]8 @
3. Same method if is not equal on 2nd try.