Answer:
13, 43, 23
Explanation:
Prime numbers are numbers that can only be mutiplied by one and itself.
13, 43, and 23 don't have any other factors other than 1.
27, 81, 21, 48, 39, and 45 are all composite numbers. They have other factors other than just one and itself.
have a great day and thx for your inquiry :)