# Greatest common factor

3 videos

2 skills

You know how to find factors of a number, but what about factors that are common to two numbers? Even better, imagine the largest factors that are common to two numbers. These are called the greatest common factors (GCF) or sometimes greatest common divisors (GCD). Yay, acronyms! Too exciting! Common Core Standard: 6.NS.B.4

### Greatest common factor examples

VIDEO
6:50 minutes

Find the biggest number that will divide into the given 2 numbers. This is called the GCF or greatest common factor.No worries, we'll show you how to do it.

### Greatest common factor explained

VIDEO
6:18 minutes

Here's a nice explanation of greatest common factor (or greatest common divisor) along with a few practice example exercises. Let's roll.

### GCF & LCM word problems

VIDEO
8:34 minutes

Here we have a couple of word problems--one searching for the least common multiple and the other for the greatest common factor. Just read them with us slowly and follow along. You'll get it.

### GCF & LCM word problems

PRACTICE PROBLEMS

Solve word problems where you either need to find the GCF or LCM.