Question

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

Answer 1

Answer:

assume n=3n

then in first case

n=3n

it's is divisible by 3

second case

n+2=3n+2

here 2 is not divisible by 3

third case

n+4=3n+4

here 4 is not divisible by 3

so only n is divisible by 3