12-27-2008, 09:06 PM
Rather than saying in weeks, I would estimate it more in hours- for me I'd say no less than 10 hours for most "easy" exams, and some of the ones that covered so much (like US History) I'd figure closer to 20+ using a reliable book. If the prep material is poor, you have to add in extra time to look up more info- like on wikipedia.