Question

Let c be a positive integer such that c + 7 is divisible by 5. the smallest positive integer n (>2) such that c + n2 is divisible by 5 is:

Answer 1

n is equal to 6



hope so it would be helpful for u

Answer 2

c+n² is divisible by 5 if and only if c and n² are both divisible by 5.

But, if c is divisible by 5 then c + 5 will not be divisible by 5.

Hope it helps!!!