15 and 9 are both odd, composite numbers less than 20.
Chat with our AI personalities
would it will be 15
19 is the tenth odd number, And is not a composite number or even number.
Some. Any product of a set of odd numbers will be odd. To be even, a composite number must have at least one even factor. Therefore odd composite numbers must exist.
9 and 15 are the only two odd composite numbers less than twenty.
42 is composite, 43 is prime.