## Featured Articles

#### Basic Math & Pre-Algebra

### 1,001 Basic Math & Pre-Algebra Practice Problems For Dummies

To successfully master basic math, you need to practice addition, subtraction, multiplication, and division problems. You also need to understand order of operations, fractions, decimals, percents, ratios, weights and measures, and even a little geometry. [more…]

#### Basic Math & Pre-Algebra

### How to Find the Least Common Multiple

The least common multiple (LCM) of a set of numbers is the lowest positive number that is a multiple of every number in that set. This article shows you how to find the LCM. [more…]

## Most Recent

#### Calculus

### Find a Cone's Volume Using the Disk/Washer Method — Practice Question

In addition to finding the volume of unusual shapes, integration can help you to derive volume formulas. For example, you can use the disk/washer method of integration to derive the formula for the volume [more…]

#### Calculus

### Limits and Continuity in Calculus — Practice Questions

When you work with limit and continuity problems in calculus, there are a couple of formal definitions you need to know about. So, before you take on the following practice problems, you should first re-familiarize [more…]

#### Calculus

### Finding Limits at Infinity — Practice Questions

At some point in your calculus life, you'll be asked to find a limit at infinity. Don't panic. Even when a limit expression looks tricky, you can use a number of techniques to change it so that you can [more…]

#### Calculus

### How Derivatives Show a Rate of Change

Differentiation is the process of finding *derivatives*. The derivative of a function tells you how fast the output variable (like *y*) is changing compared to the input variable [more…]

#### Calculus

### Find the Slope of a Line Tangent to a Curve

The *difference quotient* should have a cape and boots because it has such a useful super-power: it gives you the slope of a curve at a single point. Want to know how? [more…]