Yes, 30 is a composite number: its factors are 1, 2, 3, 5, 6, 10, 15 and 30.
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Thirty-three is a composite number.
30 is a composite number because it has more than two factors
9, 15, 21, 25, 27, 33
prime
It is composite because you can multiply 3*11 to get 33.