# Videos

The videos in our foundation series are supplied to help clients solidify their foundation of basic skills. Most concepts covered in these videos will not be tested directly on the GMAT. However, mastery of these basic skills is crucial to solving most GMAT problems. For example, the GMAT will not ask you how many degrees are in a right angle, but if you don’t know, you will have significant difficulty with many of the geometry problems. If you find yourself consistently struggling on problems from a particular area, a shaky foundation may be part of the problem. Watching these videos is an excellent way to strengthen your foundation and acquire new depths of understanding of the topics tested by the GMAT.

**Prime Numbers**

**Multiples and Factors**

**Special Right Triangles**

**Square Roots and Radicals**

**Least Common Multiples and Greatest Common Factors**

**Data Sufficiency Hints and Tactics**

**Data Sufficiency Hints and Tactics-Part Two: Examples**

**Solving Complex Equations**

**Weighted Averages**

Geometry