There are two prime numbers between 20 and 30 which are 23 and 29
Eight of them.
There are four. 23,29,31,37
Seven of them.
7 different numbers.35711131719
There are two prime numbers between 20 and 30 which are 23 and 29
20 has two prime factors which are 2 and 5
The numbers 23 and 29 are the only prime numbers between 20 and 30
The three prime numbers between 20 and 35 are 23, 29, and 31.
Eight of them.
7
These are the prime numbers 1-20 2,3,5,7,11,13,17,19
Eight of them.
There are eight prime numbers under 20.
There are 8 prime numbers between 1 and 20. The numbers are 2, 3, 5, 7, 11, 13, 17, and 19.
There are 4 prime numbers between 10 and 20. They are 11, 13, 17, and 19.
There are infinitely many prime numbers, and also infinitely many twin primes so there is no answer to the question.