Yes all are composite numbers.
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they are composite numbers
Composite numbers between 6 and 20 are 8, 9, 10, 12, 14, 15, 16, and 18.
The first 15 composite numbers are 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, and 25.
Composite. All positive, whole numbers greater than five and ending in 0, 2, 4, 5, 6 or 8 are composite.
4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30, 32