1, 2, 3, 6, 9, 18
18 is a composite number having the factors 1, 2, 3, 6, 9, and 18. The composite numbers that are factors of 18 are 6, 9, and 18.
All even numbers greater than 2 are composite.
4, 14, 18 and 10 are composite numbers.
There are 18 composite numbers up to and including 30
5 and 37 are prime. 12 and 18 are composite.
27 and 18 are both composite numbers. They are multiples of 3.
The factors of 18 are: 1, 2, 3, 6, 9, and 18.Since there are other factors in addition to '1' and the number itself,the number is composite.18 is a composite number because it has more than 2 factors18 is a composite number. A prime number has only 2 factors which are 1 and itself. Composite numbers are everything else except 1 and 0. 1 and 0 are neither prime, nor composite.18 is not prime; it is composite. 18 = 2 * 3 * 3
5 and 41 are prime numbers but 18 is a composite number
18 prime numbers
4,6,8,9,10,12,14,15,16
18 (All even numbers except 2 are composite.)
11 numbers 2, 4, 6, 8, 9, 10, 12, 14, 15, 16, 18 * * * * * NO! 2 is a prime, not a composite!