I scored 120...
Here's a little related story for this quiz... Emerson Spartz (the boy who created this trivia quiz) created a wonderful site at
http://www.mugglenet.com - and is from my hometown. He created this site as a challenge to himself when he was still just a preteen. JK took personal interest in the site and has actually called Emerson on several occassions. A few years ago, when the third movie was released, he was personally invited by her to attend the opening of the movie in London. Several weeks before the sixth book was released, she called him again and personally invited him to her home in Scotland for an exclusive interview. All of this and Emerson is now only 18 or 19. When he went to London for the movie premiere, his mother called me (who I knew through her work through our local chapter of the Unity Foundation) and we donated a "thank you" banner with the website on it. That's when I first became aware of his accomplishments and I've been hooked on his website ever since!
Just a cool little tidbit. I'm honored to know this kid - he's truly a genius and I think it's great that his passion for Potter has taken him so far!