I had to look at the screenshots to see if the point of this was to test you on the questions or explain the questions. Exactly what it is could be a lot cleare

I had to look at the screenshots to see if the point of this was to test you on the questions or explain the questions. Exactly what it is could be a lot clearer. Actually, the other side could be really interesting. The app shows you a problem (like the recognition of a number in a string) and shows you the unit tests. Then you're graded based on how many you pass.