# GMAT MATH – Topics and Concept Lessons

As you build on the information provided in the instructional videos that serve as the core teaching of your online GMAT prep course with *Dominate the GMAT*, you may find that you want a bit more detail or explanation about certain topics or concepts. The following additional concept lessons will provide that extra information, and we believe you will find them helpful as you build your knowledge base and prepare to *dominate* the GMAT!

**A B C D E F G H I J K L M N O P Q R S T U V W X Y Z**

**A
**Addition Rule of Probability

**Algebraic Functions**

Annulus (Area between concentric circles)

Area of Shaded Regions

Arithmetic Sequences

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**B**

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**C**

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**D**

Data Sufficiency – The Solvability Rule

Data Sufficiency – Yes/No Questions

Direct Variation

Distance Problems (See “Motion Problems”)

Dividend

Dividing Inequalities by a Negative Number

Divisibility – Is a Number a Multiple of Another Number?

Divisibility – Prime Factorization with Examples

Divisor

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**E**

Eliminating Wrong Answer Choices

Exponents

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**F**

Factorials

Factors

Finding the Area of Shaded Regions

Functions – (See “Algebraic Functions”)

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**G**

Geometric Sequences

Greatest Common Factor (GCF)

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**H**

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**I
**Inequalities (Dividing by Negative Numbers)

Inequalities (Two Variables)

Interest Rate Problems – Compound Interest

Interest Rate Problems – Simple Interest

Inverse Variation

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**J**

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**K**

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**L**

Least Common Multiples (LCM)

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**M**

Matrix Problems – (See “Probability – Matrix Problems”)

Mixture Problems (Wet and Dry) – Algebraic Solution

Motion Problems – Same Direction (“Catch Up” Problems)

Motion Problems – Opposite Directions

Motion Problems – Round Trip

Motion Problems – Shortcut Strategy

Multiples

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**N**

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**O**

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**P
**Pi (π)

Polynomials

Prime Factorization

Probability – Matrix Problems

Probability – Addition (Union) Rule Nuance

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**Q**

Quadratic Equations – Overview and Common Patterns

Quadratic Equations – Shortcut for Determining Roots

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**R**

Rate Problems (See “Motion Problems”)

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**S**

Sequences (Data Sufficiency Application)

Shaded Regions (see: “Finding the Area of Shaded Regions“)

Simultaneous Equations

Solvability Rule, The

Solving for “X” – Basic Algebraic Equation

Strategy: “Wouldn’t It Be Nice If…” (WIBNI)

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**T**

Time Management Techniques

Trapezoids

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**U**

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**W**

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**X**

“X” – (See “Solving for X – Basic Algebraic Equation”)

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**Y**

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**Z**

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