I found these instruction video pretty clear and helpful in the links as follows
https://www.manhattanprep.com/gmat/thursdays-with-ron/
I'm just wondering what are the difficulty levels for majority of these questions, both SC and CR ? I guess most of them are 600-700 level?
The reason I asked were:
1. gauge my level since I felt most of them not as challenging as Manhattan SC 700-800 level questions
2. see if I need to spend more time watching on the remaining topics, considering the problems may at the same level of my current scores.