one of my friend challenged me for this, i completed it

now its your turn.. if you want to do it :p
Make a program to add two numbers in which 2+2=5

output must be like 
82+5=87                                                                      //Normal sum
252+252 = 605                                                          //2+2=5
98+8=106                                                                    //Normal sum

simply 2+2=5 without effecting sum of other numbers.

i'll show my code after a few days