Question

what are odd composite numbers

Answer 1

Prime numbers have exactly two factors: 1 and itself.Composites have more than two factors. The number 1 is neither prime nor composite. Finally, if you are trying to figure out if an odd number is a prime, test to see if the number is divisible by primes like 3 and 7 first.

Composite Number. A whole number that can be divided exactly by numbers other than 1 or itself. Example: 9 can be divided exactly by 3 (as well as 1 and 9), so 9 is a composite number. But 7 cannot be divided exactly (except by 1 and 7), so is NOT a composite number (it is a prime number).

Answer 2

Prime numbers have exactly two numbers: 1 & Itself. Composite have more than two factors. The number 1 is neither prime nor composite.
Finally, You are trying to figure out if an odd number is prime, test to see if the number is divisible by primes like 3 & 7 First.