The only Prime number in that range is 29. All others are composite.
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The composite numbers between 20 and 30 are 21, 22, 24, 25, 26, 27, and 28.
The composite numbers between 20 and 30 are: 20 21 22 24 25 26 27 28 30
The composite numbers between 20 and 30 are: 20 21 22 24 25 26 27 28 30
The composite numbers between 21 and 31 are: 21 22 24 25 26 27 28 30
26, 27, 28, 30, 32, 33, 34.