23 and 29.
The prime numbers between 20 and 30 are 23 and 29.
23 and 29 are the prime numbers between 20 and 30.
They are 23 and 29 which are both prime numbers
The question does not make sense since 20 and 30 are not prime numbers!
23, 29.
They are 23 and 29.
26
29 - 23 = 6
"between" requires two numbers, for example, between 20 and 30 or between 20 and 1000. You have not specified the other number.
26
The only prime number between 25 and 30 is 29.
31 is the only prime number between 30-36.