Question

show that one and only one out of n, n+4, n+, n+12 and n+1 is divisible by 5 where n is any positive integer. (hint :any positive integer can be written in the form 5, 5q+1 , 5q+2, 5q+3, 5q+4)​

Answer 1

Answer:

n, n+4, n+, n+12 and n+1 is divisible by 5