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### Intro to Coordinate Geometry

00:09:40Strengthen your coordinate geometry skills with this introductory lesson. Learn how to plot points on the coordinate plane, calculate slope, and think intuitively about problems in coordinate geometry.

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### Mental Math: Multiplying Two-Digit Numbers

00:06:02Learn to multiply numbers up to 100 in a faster, more intuitive manner than how you were taught in school. Useful for the GMAT Quant section or any time you don't have a calculator handy.

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### Important GMAT Exponent Rules

00:08:07Learn the key exponent rules you'll need to attack several questions on the GMAT Quant section.

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### Intro to Mean and Median

00:08:28Learn the difference between mean and median, how they relate to one another, and how this knowledge will help you improve your GMAT score.

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### How To Do Practice Problems

00:09:27When preparing for the GMAT, you can follow this advice and get more value out of your practice time.

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### Mental Math: Dividing and Multiplying by 5

00:04:41Learn a couple of simple tricks to do arithmetic faster and more accurately without a calculator.

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### GMAT Reading Comprehension Question Types

00:09:21Learn about the different types of questions that follow GMAT Reading Comprehension passages.

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### GMAT Time Management

00:08:54When you take the GMAT, you're on the clock. Learn how to get through the test in the allotted time while maximizing your score.

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### GMAT Sentence Correction Hierarchy of Errors

00:06:57Not all Sentence Correction errors are created equal. Learn which ones are the most important in determining the correct answer.

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### Prime Factorization

00:07:27Allison MoffettLearn how to find the complete prime factorization of any number.

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### Circle Inscribed in an Equilateral Triangle

00:07:00Learn the relationship between a circle and an inscribed (or circumscribed) equilateral triangle.

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### Least Common Multiple

00:09:49Micheal HarrisonLearn how to find the Least Common Multiple of two integers. It's an important building block for many number properties questions on the GMAT.

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### GMAT Verbal Scratchwork

00:08:27Learn how to find the Least Common Multiple of two integers. It's an important building block for many number properties questions on the GMAT.

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### GMAT Verbal: Reading Comprehension Passage Strategies

00:07:24Learn how to work through a GMAT Reading Comprehension passage more quickly without missing any of the key points.

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### Official Guide Diagnostic DS Question 39

00:07:59Learn how to work through a GMAT Reading Comprehension passage more quickly without missing any of the key points.

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### Official Guide Diagnostic DS Question 33

00:04:16Learn how to work through a GMAT Reading Comprehension passage more quickly without missing any of the key points.

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### Mental Math: Percents

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### Intro to the Computer Adaptive Test (CAT)

00:09:59Jeff SackmannGMAT author Jeff Sackmann explains the workings of the GMAT Computer Adaptive test.

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### Official Guide Diagnostic PS 13

00:05:08GMAT author Jeff Sackmann explains the workings of the GMAT Computer Adaptive test.

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### Official Guide Diagostic PS Question 6

00:05:18GMAT author Jeff Sackmann explains the workings of the GMAT Computer Adaptive test.

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