Question

Which number is a composite number?

2

13

29

81

Answer 1

I apologize, it is a positive number more than one. I don't know why I wrote even.. It cannot be prime(which means its only multiples are 1 and its self, sor example; 13). So, look at the multiples for each..

2: 1, 2. It's prime.
13: 1, 13. It's prime.
29: 1, 29. It's prime.
81: 1, 9, 81. It's composite!

Answer 2

Thank you very much.

Answer 3

You're welcome.