Content: Arithmetic, algebra, and geometry - all of high school level
Furthermore, the content in this section should not be worrying as it is not especially difficult. However, you cannot use a calculator - so it is wise to practice your mental arithmetic!
The key to success on this area of the GMAT is learning the question types, which are likely to be different to ones you may have seen before on other tests. These consist of Problem Solving and Data Sufficiency.
GMAT Problem Solving Questions
Problem Solving is a classic question type on standardized tests. You are presented with a question and given five possible answer choices. Some questions will contain diagrams which may be drawn to scale—meaning you can "eyeball" them to estimate measurements and size relationships. Others won't. Regardless, all the questions will indicate clearly which is the case.
GMAT Data Sufficiency Questions
Data Sufficiency problems consist of a question and two statements of data. Your task is to determine whether the two statements provide sufficient data with which to answer the question.