Hi s2s2213,
The good news is that you have been able to achieve pretty high quant and verbal scores despite only prepping with a few GMAT prep books and online questions. With that said, if your score is not improving further, there are probably some fundamental issues in your studying that are not allowing you to improve your GMAT knowledge. Thus, you may consider adjusting your study routine to include some more focused practice, so you can find and fix whatever weaknesses are weighing down your GMAT score.
Remember, what makes the GMAT such a challenging exam is that there are relatively few questions asked in a given exam, yet those questions come from a huge topic pool. Thus, the best way to get a great GMAT score is to have a thorough understanding of all the topics that may be tested on the exam. To develop such mastery, you want to strive for linear and targeted learning and follow that with focused practice. In other words, you want to master one topic before you move to the next. Have you been able to study in this way?
For example, if you are reviewing Critical Reasoning, be sure to practice a large number of questions just from Critical Reasoning: strengthen and weaken the conclusion, resolve the paradox, find the conclusion, must be true, etc. The results of that practice will help you determine your weak areas within that topic. Once you find and fix your weak areas, move on to the next verbal topic.
You should follow the same routine for quant. If you are reviewing Number Properties, be sure that you can practice 50 or more questions just from Number Properties: LCM, GCF, units digit patterns, divisibility, remainders, etc. Based on the results, you can find and fix your weak areas. Only then should you move on to the next quant topic.
If your current resources do not allow for the focused practice I suggest, you may consider a more robust resource such as an online self-study course. As opposed to GMAT prep books, self-study courses typically provide detailed study plans and have granular analytics, so you can easily track your progress as you move through a course. By being able to track your progress, you will remain more engaged, and you’ll be able to more accurately forecast when you are ready to take your real GMAT.
Furthermore, if you need quant help, I welcome you to try the
Target Test Prep Quant course. It will be a game-changer for you.
If you have any further questions, feel free to reach out to me directly.