Question

n+,n+2or n+4 is divided by 3 where n is any positive integer

Answer 1

let a be an positive integer and a=3
by edl:a=3q+r,where r=0,1or2
1)if r=0,a=3q
put n=3q
n=3q is divisible by 3
n+2=3q+2 is not divisible by 3
n+4=3q+4 is not divisible by 3
therefore 1 out of n, n+2,n+4 is divisible by 3.





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