[ikhlas]

Originally Posted by scoot

I usually do these kind of problems by taking sample numbers.

for eg.

n is div by 7 remainder is 5 , so

the equation for this is

n=7*x+5.

if u take x=1

n=12.

then 2n/7= 2*12/7= 24/7 , remainder is 3 .

HTH !!!

thanks i get your idea and i solve the other on in the attachmnet ,, thanks for your helping .
ikhlas