Pencils come in packs of 8. Erasers come in packs of 10. What is the smallest number of packs of each to have exactly the same number of pencils and erasers

Step-by-step explanation:

The smallest number of packs you can have is ...

So we need to find the least common multiple of 8 and 10.

The LCM of 8 and 10 is 40.

Let's prove it:

40 / 8 = 5

40 / 10 = 4

So it is the LCM!

We also now know, that you will need 5 packs of pencils, and 4 packs of erasers to have the same amount of each!