GMAT Quantitative Reasoning measures your ability to solve quantitative problems, interpret graphical data, and reason mathematically. There are two main type of quant questions. Data Sufficiency and Problem Solving. Both questions involve solving arithmetic equations (addition, subtraction, multiplication, and division), basic algebra, and common geometric knowledge. However, the questions are really focusing on your logical and analytical reasoning rather than your underlying math skills. You have to know the concepts, but it’s more important to think clearly and methodically. Data Sufficiency questions are about your ability to analyze a problem, recognize relevant data and information, and determine if there is enough information to solve the problem. Problem Solving is actively solving quantitative problem sets and choosing the correct answer.