Hi Anish-
The question banks that go along with each book and the question bank that the 6 exams pull from are entirely separate. Essentially when you get access to the CATs, you're getting access to all 1200+ questions in the pool. The way this works is that when you take a set of 6 tests, the system remembers which questions of the 1200+ you've seen during that set. If you reset the bank and take another set of 6 tests, the system will remember which questions you saw during that set.
Hopefully that makes sense, but please let me know if you have any other questions!
Best,
Brie Truesdell
Student Services Associate
ManhattanGMAT Corporate Headquarters
138 W. 25th. Street 7th Floor
New York, NY 10001
212-721-7400
800-576-4628
studentservices@manhattangmat.com
www.manhattangmat.com