MGMAT,
I am following the MGMAT study organizer and I am just wondering that afer doing the OG Math problems which were not covered in Class (since we do Math problems beofre the class) should we also review the answers in OG or just do it and review again after the class has been taken for that topic? Thanks in advance.

You should review the questions after the class covering the topic. You may be able to gain some insight into the questions with a fresh perspective from one of our instructors. Good luck with the course!