Question

I need to know if 22,15,13, or 12 is a prime number, please help me out!

Answer 1

22 has factors of 1, 2, 11, 21, so it is a composite number.

15 has factors of 1, 3, 5, 14, so it is a composite number.

13 has factors of 1, 13, so it is a prime number.

12 has factors of 1, 2, 3, 4, 6, 12, so it is a composite number.

13 is the only prime number in this set.

Answer 2

13 is a prime number only out of those 4