Hi jwc3694,
I’m glad you reached out, and I’m happy to help. First off, a 60-point improvement in just 6 weeks is certainly impressive. That said, have you taken any official GMAC practice exams to get a baseline score?
Regarding your questions:
1) For sure, there are some strong positives that you can take away from your second exam; however, you likely will need more than just 6 weeks to improve from a 640 to a 730+. If necessary, are you able to take the GMAT at a later date?
2) As long as you follow a realistic timeline and a structured study plan, YES, a 730+ is a realistic score goal.
3) Regarding your approach, its difficult to say whether what you are doing is enough for you to hit your score goal. The best thing you can do is objectively evaluate your progress so that, in the event that you are not making the improvements you need, you can consider adjusting your study plan or using additional prep materials.
Feel free to keep me updated and reach out with further questions. You also may find it helpful to read this article about
how to score a 700+ on the GMAT.
Good luck!