It all depends on how good your mind is at remembering such huge volumes of information. I could just learn each subjects questions once and remember about 90-95% of them. Then the other 5-10% I just marked and concentrated on them only. Its different for everyone, some persons need to go over an entire subjects questions numerous times before they can remember them. A good indicator in my opinion is History. A subject which requires one to remember copious amounts of information. If you were good at History in school then your mind is most likely good at remembering large quantities of information and the questions shouldnt require huge amounts of time to study and retain.