* Arithmetic: This includes operations with whole numbers, fractions, decimals, and percents. You'll need to be proficient in solving problems involving ratios, proportions, and basic geometry.
* Algebra: You'll need to solve linear equations and inequalities, work with graphs and functions, and understand basic algebraic concepts. This isn't typically at the level of a full Algebra I course, but it requires a solid understanding of the fundamentals.
* Geometry: You'll be tested on concepts like area, perimeter, volume, and the properties of shapes. Basic trigonometry is *not* generally included.
* Data Analysis: This involves interpreting graphs, charts, and tables, and understanding statistical concepts like mean, median, and mode.
In short, while there's no single grade level, a strong foundation in pre-algebra and introductory algebra is generally sufficient. Many GED preparation programs recommend a review of these topics before taking the test. If your math skills are rusty, focusing on strengthening your understanding of the core concepts listed above will significantly improve your chances of success.