yes.
no the only even number that is composite is two
Twenty is composite. It has the factors 1, 2, 4 ,5, 10, and 20. Prime numbers have exactly two factors. Composite numbers have three or more.
Two is prime. All other even numbers are composite.
It is composite.
composite
No.
9 and 15 are the only two odd composite numbers less than twenty.
Yes.
Yes.
Yes.
4,6,8,12,24
composite. 123 = 3 * 41