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
27 and 18 are both composite numbers. They are multiples of 3.
5 and 37 are prime. 12 and 18 are composite.
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!