Question

show that one and only one out of n,n+2,n+4 is divisible by 3 , where n is any positive integer​

Answer 1

Step-by-step explanation:

if possible let a be any positive integer and b=3.

possible numbers-

n,n+1,n+2,n+3,n+4

number which divisible by 2 =n+2 and n+4

number which divisible by 3 =n+3

hence proved only one number be divisible by 3