4,6
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There are 16 such numbers.
The composite numbers between 10 and 20 are 12, 14, 15, 16 and 18.
The composite numbers between 11 and 19 are 12, 14, 15, 16 and 18
They can be 16 and 24
Composite numbers are positive integers greater than 1 that have more than two factors. Between 15 and 25, the composite numbers are 16, 18, 20, 21, 22, 24. These numbers can be divided evenly by factors other than 1 and themselves, making them composite.