Question

Show that one and only one out of n, n+2 or n+4 is divisible by 3, where n is any positive integer.

Answer 1

Answer:

n+4 = 3q+2+4 = 3q+6 = 3(q+2) is divisible by 3. thus one and only one out of n , n+2, n+4 is divisible by 3.

Answer 2

Answer:

I have uploaded a picture please check