Looking for a challenge? We promise you, this tricky trivia test isn't for the faint of heart. Test your knowledge of Harry Potter numbers, those nitty-gritty details that most fans overlook. In doing so, you will also be advancing the science of testing - how we ask test questions, and how we can improve this process for future generations. This quiz is part of a research study comparing two types of test questions, "traditional multiple choice" and "discrete option multiple choice" (DOMC). Consider yourself a Harry Potter fan? This is your chance to prove it!