Join SDN on December 7th at 6:00 PM Eastern as we host Andrew Paulson of StudentLoanAdvice.com for an AMA webinar. He'll be answering your questions about how to best manage your student loans. Register now!
You cannot ask a question like that. It all depends, it's a personal thing. Some people recently took prereqs and are still fresh in the material and don't need to study for long. Some took them a while back and need to review. Some don't retain as well as others. You need to create a study plan that caters to your learning style, your ability, and your needs. No one can answer that for you.