One hundred and twenty
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12 is a composite number because it has more than two factors
All composite numbers have more than 2 factors. The factors of 12 are 1, 2, 3, 4, 6, and 12, and this proves that 12 is a composite number.
The factors of 12 are 1, 2, 3, 4 ,6, 12. Since 12 has more than two factors it is composite, not prime.
28 7, 4, 2
Any number with more than 2 factors is composite.12 has six factors, so it's composite.18 also has six factors, so it's composite too.(Only 4 of the factors of 8 are the same as 4 of the factors of 12)