You can use this question type for questions which require a number answer.

You will notice a cog next to the answer input. This is for more advanced questions where there are several calculation steps involved and you want to allow some leeway with decimals.

If you click on it, you'll see a modal window pop up with options to allow you to add significant figure checking and tolerance:

The player will simply see the question and an input box which allows them to type a number in