When you start with a lesson, you can see that there are three types of questions.
basic level: these questions just check whether you have read (and understood) the text carefully. If you fail these, you just didn't read the text.....
deeper level: these questions are more difficult. Sometimes the answers are not found litterally in the text. You actually have to use your brain more...
challenge level: this is for you to show what you are really capable of. These questions ask you to make connections, show insight, look up extra information, understand sources.