Feature Idea: "Game" or "Question" Generator

Treehouse has great quizzes in their courses with their code challenges and general quizzes.

It would be awesome to have a feature like the quiz/challenges but not tied to taking a course.

Something like https://www.enki.com/

Treehouse could get fancy, with suggestions for further reading when you get a questions wrong, badges, a point system--- but I would start using something like this without any of that. Just a basic one that you can drill yourself with like flash cards. As an MVP, treehouse could even start by just having something that takes questions from every single JS course and lets you answer them.

It could even be leveraged by Treehouse as a marketing/inbound tool if they offered it for free on their landing page. Maybe after so many questions it prompts you to sign up. Or just use the situation when somebody gets a wrong answer to point out courses on treehouse for that subject... or maybe the free version doesn't keep track of your score. There are many possibilities.

TLDR: a quiz question generator feature (similar to the course quizzes but not tied to any course) would be an awesome feature and could even be a marketing tool for Treehouse.