What is so important about a 700+ score? In real terms, not much, as 710 is just a little better than 700. But 710 hits the psychological mark of a 90% percentile ranking. It means you are in the top 10% of test-takers. With a score of 700, your percentile ranking is 88% and you are in the top 12%. [The percentile rankings change with time. In 2018, you needed 700 to be at 90 percentile, and in 2000 you needed only 680.]
You can get to 710 with different combinations of Quant and Verbal scores. A very rough-and-ready approximate formula, from looking at recent scores, is that you will score 710 if your Quant and Verbal raw scores are at least 42 and 35 respectively and add up to between 85 and 88. So you can get 710 with Quant 51/Verbal 36, Quant 50/Verbal 37…. up to Quant 42/Verbal 46. With Quant 51/Verbal 35 you will probably get 700, not 710.
This means 700+ is not possible without solid performances in both Quant and Verbal. If you get the top score of 51 in Quant, you need 36 in Verbal. But nobody can be sure of getting 51 in Quant, as even a single mistake can take the score to 50. So however strong your Quant may be, you must prepare well enough to score 38+ in Verbal. Conversely, even if you are confident of the 98% percentile Verbal score of 44, you need at least 43 in Quant.
Getting to these levels of proficiency requires time and effort. How much time and how much effort will be different for different people. But whatever be the starting point, GMAT preparation must be systematic and focused. Otherwise, it is possible to practice for months and end without any improvement.
One prerequisite for a high GMAT score is the ability to understand college-level English. If this is a problem, make up the deficiency before you start preparing for the GMAT.
The road to a 700+ score starts with a mastery of basic content and skills. First, you must learn (or revise) some basics. For instance, you should know how to simplify exponents and know the Pythagorean Theorem and common Pythagorean triples. For Sentence Correction, you must learn basic grammar rules that the GMAT tests. For Critical Reasoning, you should know how to break an argument into its parts and spot flaws in arguments and you should be familiar with common argument patterns. Then you must learn skills too – processes and techniques by which you apply basic knowledge and do GMAT questions.
You could learn all this on your own or by taking a self-paced online course. However, GMAT classes with a teacher are a much more efficient method of learning. Many types of classes are available. You could take individual coaching or join a structured, scheduled small group course. You could take the classes online or in person.
Once you learn something, you need the practice to achieve mastery. Try to learn something from each practice question, especially from each mistake. Read explanations and talk to your teachers. Look for faster, more efficient ways to do questions. Maintain a record of what you learn and go through it regularly. Otherwise, it is easy to forget things and repeat old mistakes.
Knowing how to do the questions is not enough. Time management in the exam is equally important. You have a very limited budget of time during the GMAT, so it must be used wisely. Your teachers will advise you on GMAT pacing. To perfect and practice your pacing plan, do mock tests at regular intervals.
With systematic practice, questions will require less effort and time, mistakes will reduce, and you will keep learning more. Your aim is to reach a stage where you get easy and medium difficulty questions right, effortlessly, and consistently. When that happens, you will get many hard questions right too. You need a tried-and-tested pacing plan. If all this is in place, you can be sure of the 700+ score in the GMAT.