Question

2) Show that one and only one out of n,n+2,n+4 is divisible by 3,
where n is any positive integer[4 marks]​

Answer 1

Answer:

let n be 1,

then 1,3,5 are the numbers,so for every value of n>=1,they must be alternative numbers with common difference 2,where anyone if them is exactly divisible by 3 and others cannot.