23, 29, 31, 37
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Multiples of 5 are not prime numbers except 5, so there are none. But, there are prime numbers between 20 and 40, like 23, 29, 31 and 37.
There are four prime numbers between 20 and 40
There are four. 23,29,31,37
23 29 31 37.
23 29 31 37.