We've all read and re-read the "Harry Potter" books and spent many pleasant hours watching the film adaptations of the beloved series, but how well do you really know "Harry Potter"?

Think you know ever nook and cranny, every fact dropped in the books? It's time to put that knowledge to the test with this quiz. Can you fill in the blanks from Professor Albus Dumbledore's end-of-term speech, as written by J.K. Rowling in "Harry Potter and the Sorcerer's Stone"?

Give the quiz a whirl, and let us know how you do in the comments. In the meantime, we'll leave you with just a few words: Nitwit! Oddment! Blubber! Tweak!