Question

5) Show that one and only out of n, n+ 2 or noe
divisible by 3 where in
any
se positive
integer​

Answer 1

Answer:

n+2 = 3q+2+2 =3q+4 = 3(q+1)+1 is not divisible by 3. 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.