Hi there,
I stumbled upon a weird question in one of my exams which I couldn't solve so I out of curiosity I wanted to see what the solution could be. Here goes:
Given some natural number N and some natural number Z, how would you find out if the following summation is divisible by Z:
Any ideas on how to check if the above is divisible by Z without actually having to solve it? Is there some sort of pattern?
Regards,
Austin