GMAT Prep Essentials From Khan Academy

The Khan Academy Fundamental GMAT Quant Curriculum



Adding and Subtracting Fractions

Multiplying and Dividing Fractions

Converting between Decimals and Fractions

Mixed Numbers and Improper Fractions

Comparing Fractions

Long Division with and without Remainders


Prime Factorization and Divisibility

Least Common Multiple

Greatest Common Divisor

Unit Conversion


Exponents, Square Roots, and Scientific Notation




Systems of Equations




Line Segments, Angles, Triangles, 3D Shapes (you can safely ignore cones and the surface area of a cylinder)



Basic Coordinate Plane

Equations of a line (Don’t worry about memorizing point slope form or standard form)

Slope Intercept Form



Mean, Median, Mode


Other Helpful Topics

Number Properties

Basic Combinations/Permutations

Basic Probability

Andrew Geller of Atlantic GMAT

Andrew Geller of Atlantic GMAT

Andrew Geller a GMAT expert who scored an impressive 770 on the exam. Unlike some of the nerdy GMAT tutors out there, Andrew can actually write. He’s been teaching since 2002 and throughout the past decade has worked for various big and small test prep companies helping people succeed on the GMAT, LSAT, SAT, ACT, and GRE. Throughout his career he has successfully taught people from many different backgrounds, countries, and starting scores.

He now leads Atlantic GMAT, a company which he founded to provide a creative and nuanced approach to GMAT preparation especially for students who have struggled to achieve their GMAT goals through big box test prep. Andrew is answering any of your GMAT questions on Poets&Quants here.

In his spare time, Andrew likes to play music, ride his motorcycle to the beach, play ping pong, and ski. Andrew spent a year teaching English in Brazil and is fluent in Portuguese.