# Chapter 2 - Multiplying and Dividing Fractions - 2.3 Factors - 2.3 Exercises: 21

Composite

#### Work Step by Step

A prime number is a whole number that has exactly two factors, itself and the number 1. Any number besides 0 and 1 that are not prime are composite. The number 10 is not prime, because $2\times5=10$. Therefore, 10 has factors besides 1 and 10, so it must be a composite number.

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