This is an example of a simple numerical question.

When did mojitos become the official Moodle Moot drink?

(image thanks to Keno)

This is an example of a simple calculated question. It's similar to the calculated question but with fewer settings

You won a cool Moodle cooler box at a Moodle Moot and wonder how much it will hold. What is the volume of your cooler box if its height is 4.6 its length is 4.0 and its width is 9.7?

This is an example of a True/False question type.

This picture is of the founder of Moodle.

This is an example of a calculated multi-choice question. It is like the calculated question in that the numbers used may vary with each student and question, but the equation remains the same but it is different from the calculated question in that there is a choice of answers available.

You are making a banner for your organisation's Moodle User Group meeting. Its length is 19 and its height is 5 What is its area?

This is an example of a calculated question. The numbers will vary but the formula stays the same. 

You're doing some training in your organisation. In your group you have 4 complete beginners and 17 relatively experienced Moodle users. How many are there in your group in total?