"Let $x$ and $y$ be integers such that ..."

"If $y$ is a positive integer, what is ... ?"

If you've taken the ACT or an ACT practice test, these types of math questions might look familiar to you. **You've likely come across several questions on the ACT that mention the word "integer."** And if you don't know what this term means, these problems will be difficult to solve.

Questions involving integers are common on ACT Math, so it's important to have a solid grasp of them as you prepare for the test. What are integers and how do they fit into the larger ACT Math picture?

**This article will be your guide to basic integers for the ACT, going over what they are, how they change, and how you'll see them used on the test.** For the more advanced integer concepts, including absolute values, exponents, roots, and more, refer to our advanced guide to ACT integers.