What are the prime numbers between 20 and 30?

23 and 29 are the prime numbers between 20 and 30.

The two prime numbers between 20 and 30 are 23 and 29.
23, 29

All the prime numbers will be odd so you can immediately eliminate 22, 24, 26 and 28

21 = 3x7 so that 's not prime

25 = 5x5, so that's not prime

27 = 3x3x3 so that's not prime