What are the prime numbers between 20-30?

Skylar Greer

Skylar Greer

Answered

2022-12-26

What are the prime numbers between 20-30?

Answer & Explanation

Dorian Beasley

Dorian Beasley

Expert

2022-12-27Added 11 answers

The numbers between 20 and 30 are:
21,22,23,24,25,26,27,28,29
Since even numbers are by definition divisible by 2, all even numbers other than 2 are not prime. This leaves us with:
21,23,25,27,29
21=3×7 - not prime
25=5×5 - not prime
27=3×9 - not prime
This leaves:
23,29
For both of these numbers the only numbers they are evenly divisible by is 1 and themselves.
Therefore, 23 and 29 are the prime numbers between 20 and 30.

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