Some efficient strategies for tackling quant which i find useful are
BacksolvingUsing the answer choices to test if they’re the correct answer. For example, if the question is “What’s X if 2x = 8?” And there’s answer choice of 3, you know that isn’t the correct answer. If there’s an answer choice of 4, however, you know it is correct.
Picking Numbers
Using numbers positive, negative, whole, fractions, etc. - to estimate what the correct answer is. For example, if the question is, “What’s the remainder of a prime number greater than 3, divided by 12?” you could pick 5, or any prime number greater than 3, and would determine that the remainder is 1.
These GMAT tips are essential parts of data sufficiency (DS) strategy, as well. But DS requires an additional layer of strategy. For that reason, and because problem solving looks similar to the word problems we all encountered in high school, problem solving is a good place to start. These GMAT tips will explain what your mindset towards PS should be, how to practice, and how to review completed practice problems.