hello,
Thank you for joining gmatclub!
Please be aware that a GMAT score of at least 750 is very difficult to achieve and you would belong to the best 1% of test takers worldwide! You would even be qualified to work as a tutor for all test prep companies.
It is possible but not very likely that you will achieve such a score within just 77 days...550 is about the worldwide average score (and you scored this in a practice test, not under real conditions) and you want to get to the best GMAT test takers in about 2 months.
Please be aware that you want to achieve something that most of the students can't do in one year full time studying! I am not saying that you will not make it, I just want you to get an understanding of the difficulty of your goal!
That being said, I would suggest to have an expert who will assist you. If you want to get to 99th percentile level you should also get a 99th percentile tutor. This tutor should create an individual study plan for you and identify your weaknesses. You should do many practice tests to observe your progress. Please visit the following link to learn more about Optimus Prep's unique approach that was designed to get the highest possible GMAT score:
https://www.optimus-prep.com/our-unique-approachIf you are interested in online private tutoring please take a look on the following link:
https://www.optimus-prep.com/gmat-privat ... ing-onlineI wish you good luck for your studying!