GRE Math Review Topic Relevant Section on Khan Academy Site ARITHMETIC 1.1 Integers Arithmetic: Multiplication and Division Arithmetic: Negative Numbers and Absolute Value Pre-Algebra: Factors and Multiples 1.2 Fractions Arithmetic: Fractions 1.3 Exponents and Roots Pre-Algebra: Exponents, Radicals, and Scientific Notation 1.4 Decimals Arithmetic: Decimals Pre-Algebra: Arithmetic Properties See "Rational and Irrational Numbers" subsection. 1.5 Real Numbers Arithmetic: Negative Numbers and Absolute Value Pre-Algebra: Equations, Expressions, and Inequalities See "Inequalities: Greater Than and Less Than Basics" subsection. 1.6 Ratio Pre-Algebra: Ratios, Proportions, Units, and Rates 1.7 Percent Arithmetic: Decimals ALGEBRA Sections 2.1 through 2.9 Algebra I: Introduction to Algebra 2.1 Operations with Algebraic Expressions Algebra Basics: Algebraic Expressions 2.2 Rules of Exponents Algebra Basics: Expressions with Exponents 2.3 Solving Linear Equations Algebra I: One-variable Linear Equations Algebra I: Systems of Linear Equations 2.4 Solving Quadratic Equations Algebra I: Quadratic Equations and Functions 2.5 Solving Linear Inequalities Algebra I: One-variable Linear Inequalities 2.6 Functions Algebra I: Functions 2.7 Applications Pre-Algebra: Applying Mathematical Reasoning Algebra I: Linear Equations and Functions Word Problems 2.8 Coordinate Geometry Algebra I: Two-variable Linear Equations Algebra I: Systems of Linear Equations Algebra I: Two-variable Linear Inequalities Algebra I: Quadratic Equations and Functions 2.9 Graphs of Functions Algebra II: Manipulating Functions GEOMETRY 3.1 Lines and Angles Geometry: Tools of Geometry Geometry: Angles and intersecting lines 3.2 Polygons Geometry: Perimeter, area, and volume Geometry: Angles and intersecting lines 3.3 Triangles Geometry: Congruence Geometry: Similarity Geometry: Right triangles and trigonometry Geometry: Perimeter, area, and volume 3.4 Quadrilaterals Geometry: Quadrilaterals Geometry: Perimeter, area, and volume 3.5 Circles Geometry: Circles Geometry: Perimeter, area, and volume 3.6 Three-Dimensional Figures Geometry: Perimeter, area, and volume DATA ANALYSIS 4.1 Graphical Methods for Describing Data Pre-Algebra: Applying mathematical reasoning See "Reading and Interpreting Data" subsection. 8th Grade (US): Data and modeling See "Scatter Plots" subsections. 4.2 Numerical Methods for Describing Data Probability and Statistics: Descriptive statistics 4.3 Counting Methods Probability and Statistics: Probability and combinatorics 4.4 Probability Probability and Statistics: Independent and dependent events 4.5 Distributions of Data, Random Variables, and Probability Distributions Probability and Statistics: Random variables and probability distributions Statistics and Probability: Modeling distributions of data 4.6 Data Interpretation Examples Pre-Algebra: Applying mathematical reasoning See "Reading and Interpreting Data" subsection.