Hi lilypond789,
I’m glad you reached out and I’m happy to help. Unfortunately, it is highly unlikely that you will be able to drastically increase your GMAT quant score in just one month. Many students need three to four months of consistent prep to improve a GMAT score by such an amount. Are you able to take your GMAT at a later date?
Regarding your study routine, it appears that you have not fully mastered GMAT quant prior to practicing
OG questions and taking practice exams, and thus your quant score has stagnated. Moving forward, you should focus on a linear study routine. Specifically, within each quant topic, begin with the foundations and slowly progress toward more advanced topics.
For example, when learning about number properties, first spend time learning about the various topics within number properties, such as LCM, GCF, units digit patterns, divisibility, remainders, etc. Once you have developed conceptual knowledge, practice what you have learned by answering 50 or more questions just from number properties. As you practice, do a thorough analysis of each question that you don't get right. If you get a remainder question wrong, ask yourself why you got it wrong. Did you make a careless mistake? Did you not properly apply the remainder formula? Was there a concept you did not understand in the question? By carefully analyzing your mistakes, you will be able to efficiently fix your weaknesses and in turn improve your GMAT quant skills. Number properties is just one example; follow this process for all quant topics.
Each time you strengthen your understanding of a topic and your skill in answering questions of a particular type, you increase your odds of hitting your score goal. You know that there are types of questions that you are happy to see and types that you would rather not see, and types of questions that you take a long time to answer correctly. Learn to more effectively answer the types of questions that you would rather not see, and make them into your favorite types. Learn to correctly answer in two minutes or less questions that you currently take five minutes to answer. By finding, say, a dozen weaker quant areas and turning them into strong areas, you will make great progress toward hitting your quant score goal. If a dozen areas turn out not to be enough, strengthen some more areas.
When you do dozens of questions of the same type one after the other, you learn just what it takes to get questions of that type correct consistently. If you aren't getting close to 90 percent of questions of a certain type correct, go back and seek to better understand how that type of question works, and then do more questions of that type until you get to at least around 90 percent accuracy in your training. If you get 100 percent of some sets correct, even better.
So, work on accuracy and generally finding correct answers, work on specific weaker areas one by one to make them strong areas, and when you take a practice GMAT or the real thing, take all the time per question available to do your absolute best to get right answers consistently. The GMAT is essentially a game of seeing how many right answers you can get in the time allotted. Approach the test with that conception in mind, and focus intently on the question in front of you with one goal in mind: getting a CORRECT answer.
In order to follow the path described above, you may need some new quant materials, so take a look at the GMAT Club reviews for the
best quant courses.
You also may find it helpful to read my article for more information regarding
how to score a 700+ on the GMAT.