Question

12. Let C be a positive integer such that (C+7) is divisible by 5. Then the smallest integer n (>2) such that c+n^2 is divisible by 5
is
05
Does not exist​

Answer 1

Step-by-step explanation:

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!!!