I understood your approach for this problem. However , would like to have your opinion why the below solution as given in the older post is wrong?
so (p^2 - n^2)/15 = (p+n)/5 * (p-n)/3...
so remainder will be equal to 1*1 = 1
Please advise as to what was wrong in this solution in detail.
I Assisted You => KUDOS Please