"Exams can be retaken."

Is this sarcasm? I suppose if you fail and have to retake the class, then you can "retake" the exam, but that closes a lot of doors when trying to get in to a good college. And most likely if you're "not dumb", you'll end up with a C on the exam and pass the class with a low grade, rather than outright failing it. In which case you would not be able to retake the exam.

Somewhat funny coincidence that the top picture on your twitter (linked from your profile) is of the former prime minister of Sweden who changed the rules for student loans so they can be suspended after failing just one exam.