# Which of the numbers 26 28 33 and 51 are composite?

They are all composite.

### What are some examples of composite numbers?

Composite numbers are positive integers that have integer factors other than itself and 1. The number 12, for example, has factors (other than 1 and 12) of 2, 3, 4, and 6 - that is, any of those numbers can be evenly divided into 12 - and therefore 12 is a composite number. The first few composite numbers are 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26…