# GMAT Hacks

GMAT Hacks
• ##### Intro to Coordinate Geometry

Strengthen 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.

• ##### Mental Math: Multiplying Two-Digit Numbers

Learn 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.

• ##### Important GMAT Exponent Rules

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

• ##### GMAT Overlapping Sets

Learn how to handle GMAT Overlapping Sets questions.

• ##### Intro to Mean and Median

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

• ##### Mental Math: Multiplying by 9

Use a bit of (simple!) algebra to multiply by 9 faster.

• ##### GMAT Absolute Value

Learn how to manipulate expressions with absolute value signs.

• ##### How To Do Practice Problems

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

• ##### Mental Math: Dividing and Multiplying by 5

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

• ##### GMAT Time Management

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

• ##### GMAT Sentence Correction Hierarchy of Errors

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

• ##### Prime Factorization
Allison Moffett

Learn how to find the complete prime factorization of any number.

• ##### Circle Inscribed in an Equilateral Triangle

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

• ##### Least Common Multiple
Micheal Harrison

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

• ##### GMAT Verbal Scratchwork

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

• ##### GMAT Verbal: Reading Comprehension Passage Strategies

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

• ##### Official Guide Diagnostic DS Question 39

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

• ##### Official Guide Diagnostic DS Question 33

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

• ##### Mental Math: Percents

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

• ##### Intro to the Computer Adaptive Test (CAT)
Jeff Sackmann

GMAT author Jeff Sackmann explains the workings of the GMAT Computer Adaptive test.

• ##### Official Guide Diagnostic PS 13

GMAT author Jeff Sackmann explains the workings of the GMAT Computer Adaptive test.

• ##### Official Guide Diagostic PS Question 6

GMAT author Jeff Sackmann explains the workings of the GMAT Computer Adaptive test.