Yeah, serious math fail all over the place. Also, 15 and at college? (congrats if so)
Most importantly though, dull and boring? Pfft, please; her Hermione stole the Potter movies (to be fair, Ron fans can have a fair complaint about her getting most of his good stuff, but that's not the point).
Remember that college doesn't mean University to us*
* sorta of - there are exceptions.