Find the least common multiple of 9, 6, and 2.

18

Step-by-step explanation:

This is because when you find the prime factors, you can take out the ones that they have together.

In this case:

9 - 3 * 3

6 - 3 * 2

2 - 2

So notice that each number has a maximum of 2 3s and 1 2, thus, you can multiple 3 * 3 * 2