@Pooja Roy Chaudhury Hi ! I would say yes it works most of the times because the mindset after all comes from common sense and best practices. Don't worry! On study hall also sometimes I got less than 60% (even lesser). That’s why I said that study hall provides you with what Andrew’s simulator doesn’t. For me the difference in score is related to 2 main reasons: 1- I think that the questions on study hall were provided by many contributors throughout different years, mindset changes from one person to to another even though on study hall they state the source of the justification 2- This brings me to the second point: If you pay attention to justifications, some questions come from the old PMBOK 6th edition, probably Andrew didn’t cover enough from that edition or other books. PMI has many publications, not only the PMBOK, it’s practically impossible that Andrew or other person covers everything in every book.. My final opinion: keep doing both Andrews simulator and study hall. When you get a low score on study hall, see it as an opportunity to learn something new from those questions. Whenever you get a wrong answer, go back and read the explanation and learn it.. and so on and so forth.. this builds your knowledge. Try to cover everything before at least one week from the exam. The last week, when you finish learning those new questions, try to have more than 70% on the full study hall mock exam. I wish all the best, keep focusing. If you reached this step in your career it means that you had to face and pass harder challenges in the past! You can do it, don’t panic! Good luck 😉