Question

Chloe has 20 unit cubes. How many different rectangular prism can she build with the cubes?

Answer 1

`4`

Explanation:

Look at the factors of `20`.
They are `1,2,4,5,10 and 20`.

Pick any two of these factors and determine if there is a third value from this list so that the product of the three factors is `20`

There are `4` combinations that will work :
`1xx1xx20`
`1xx2xx10`
`1xx4xx5`
`2xx2xx5`

Hence, Chloe can build 4 different rectangular prisms with `20` unit cubes.