The composite numbers from 2 - 30 are:
4, 6, 8, 9, 10, 12, 14, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28 and 30
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Well, a composite number is a composite number because it has more than two factors. For example, the number 2 is Prime because it ONLY has 2 factors, which is 2 and 1. Another example is that 30 is a Composite number because it has MORE than 2 factors which are 1, 30, 6, and 5.
30 and 135 are composite numbers. 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.
All even numbers are composite, because 2 is a factor of every even number.
All even numbers other than 2 are composite, so the even composite numbers between 30 and 50 are 30, 32, 34, 36, 38, 40, 42, 44, 46, 48, and 50.
The next four composite numbers after 30 are 32, 33, 34 and 35.