The first prime above 20 is 23, and then all others (29 is the next).
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The numbers 23 and 29 are prime.
23 and 29 are the prime numbers between 20 and 30.
NO!!!! Other than '2' all prime numbers are odd numbers. 4,6,10 & 20 are all even so they are not prime numbers.
These are the prime numbers 1-20 2,3,5,7,11,13,17,19
The prime numbers less than 20 are 2, 3, 5, 7, 11, 13, 17, and 19.