I have 3 questions:
1. With 30 days left, is it better to focus on one source of material (Official Guide) or multiple sources of material?
I have worked all of the Official Guide problems and some Princeton Review questions pertaining to my weaknesses. My plan was to repeat the OG problems with a timer to ensure that I can get all of them completed within 1-2 minutes. Is this a waste of time? Would you recommend branching out into new materials (Manhattan GMAT, Kaplan, etc) instead of focusing on the OG?
2. How do you approximate your GMAT score?
I've noticed that people on the forum have a strong understanding of what their score is. Aside from the Official GMAT Prep software, how do you approximate your performance on the test? I have a vague understanding of my performance, but because the score is based on timing and level of difficulty (not percentage correct), I have no clue how this translates to a GMAT score.
3. Do you have any tips on building endurance and stamina?
I've been studying 3 hours per day on weekdays and 4-7 hours per day on weekends. I have found that I can usually only do 1-2 hours without getting fatigued... which usually results in a streak of wrong answers. Any tips on how to stay alert for 4 hours straight? How many GMAT problems do you typically do in one setting?
1. With 30 days left, is it better to focus on one source of material (Official Guide) or multiple sources of material?
I have worked all of the Official Guide problems and some Princeton Review questions pertaining to my weaknesses. My plan was to repeat the OG problems with a timer to ensure that I can get all of them completed within 1-2 minutes. Is this a waste of time? Would you recommend branching out into new materials (Manhattan GMAT, Kaplan, etc) instead of focusing on the OG?
2. How do you approximate your GMAT score?
I've noticed that people on the forum have a strong understanding of what their score is. Aside from the Official GMAT Prep software, how do you approximate your performance on the test? I have a vague understanding of my performance, but because the score is based on timing and level of difficulty (not percentage correct), I have no clue how this translates to a GMAT score.
3. Do you have any tips on building endurance and stamina?
I've been studying 3 hours per day on weekdays and 4-7 hours per day on weekends. I have found that I can usually only do 1-2 hours without getting fatigued... which usually results in a streak of wrong answers. Any tips on how to stay alert for 4 hours straight? How many GMAT problems do you typically do in one setting?

















