Getting your quant score up from 154 to around 165 deals with you doing the following things,provided you can spend a minimum of two hours a day for a month and a half:

1. Brushing up your fundamentals : This may seem obvious, but you need to have a strong grasp of basics. Remember on the GRE you have on an average a minute and a half to answer a question so a shaky grasp of the fundamentals can slow you down.

2. Improving your reasoning skills: Fixing your math fundamentals is only half the battle won. The GRE quant section does not only test you on your math skills but also tests you on your reasoning. In fact the harder questions will test you more on reasoning with the math being very elementary. To learn the “tricks of the trade” practice with official material ETS guide and the two supplementary quant and verbal reasoning guides. In addition to this the Manhattan 5lb book is a good resource for both quant and verbal.

3. Analyzing Questions : Pay attention to your mistakes. Ask yourself how you got trapped in the first place. For instance, if it is a percent problem that seemed so easy, what twist was throw in there? Deconstructing questions in this manner will help you greatly. Concentrate on the Quantitative Comparison questions as the traps here are very intricate.

4. Use the official tests wisely : The official test are pure gold and are as close you can get to the actual test, but they are only 2 of these available. You can always take the official tests multiple times to access the entire pool of questions. In addition to this the 6 tests that Manhattan GRE provides serve as a good resource for additional test practice.

5. Figure out Alternate Methods of Solving: Finally, learn effective techniques such as approximation, plugging in and backsolving techniques we math students never learn. Remember the GRE does not measure HOW you got the answer, it measures IF you got the answer.