Do the math section faster

(1) Many students tend to rush when they read a question for the first time. Then, thirty seconds later they look back at the question only to realize that they have been answering the wrong question or that they didn't talk all of the information into account. When you first look at a question read it carefully, remember or write down all the important information given, and then construct a plan of attack.

(2) While you need to know the basics, this is not exactly a math or English test. What the GMAT tests is your ability to rapidly apply basic mathematical concepts in creative ways. Remember, these questions were made to be solved in less than two minutes if done in the right manner. There are usually two or three ways to do a math question, but one of the ways is almost always much faster. The best test takers use logic to get around doing complicated calculations as often as possible. As stated above use techniques like inserting numbers, backsolving, etc... to find shortcuts.

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https://fr.standardizedtests.org/content ... ion-faster
and the information is updated from time to time