The function of the OG Stopwatch is to time how long you take to complete your problems. It does not actually show any problems, it just times the ones you do from your book. The best way to use this function is in combination with the Official Guide. You can choose a set of problems in the book that you wish to do, then use the stopwatch to time the problems that you are doing from the book.
In other words, while the OG stopwatch records your answer choices and helps you know how much time you took on each question, it does not list questions for you. As stated on the OG Stopwatch page:
"NOTE: You will not see ANY actual OG questions as this feature will only record your answers as you work from the guide. You will then be able to copy and paste your answers into the OG Tracker which will analyze your performance. All OG problems are copyrighted by the GMAC and cannot be reproduced in any form."
Please let me know if you have any other questions.
Student Services Associate