You can't prepare for the GRE test. In general, the test is a test of patterns, not facts, so if you want to increase your GRE score, you'll need plenty of time to practice. We suggest you spend 4-12 weeks preparing for the GRE. Taking into account all the points we have mentioned, the GRE preparation will take between 4 and 20 weeks.
If you include the mock tests you would have to perform, the preparation time can range from a minimum of 6 weeks to a maximum of 24 weeks. As mentioned earlier, there is a great deal of variation in the amount of time people choose to prepare for the GRE. However, most people spend between one and three months studying a few hours a week for GRE. This means that the number of studies for GRE could range from approximately eight hours (studying two hours a week for four weeks) to 120 hours (studying ten hours a week for 12 weeks).
Taking into account all the points mentioned above, the GRE preparation time would be four to ten weeks. And if you include all practice sets and mock tests, it can take anywhere from six to twenty-four weeks. However, few people like to learn slowly and spend three months studying for a few hours a day. If you work with math on a daily basis, you'll likely need less preparation in that area, which can reduce the amount of time you need to efficiently prepare for GRE.
To continue with the previous example, if you needed nine weeks to prepare to take the GRE for the first time and you want to budget time to retake it, you will need a total of 13 weeks from when you start studying until you take the GRE for the second time. Factors that change the time you need to fully prepare for GRE include the GRE test scores you need for your target graduate schools, how long you've been out of school, how much you read, your language skills, your experience with standardized tests, and more. Therefore, taking into account the three weeks for schools to receive grades, the person in the example would have to start preparing for the GRE 16 weeks before the first application deadline (9 weeks to prepare for the first exam + 4 weeks to prepare for a new test + 3 weeks for the first test to be schools receive grades). Before you start preparing for GRE, you should review the GRE curriculum, target score, and limit of the different universities.