Understanding the Greatest Common Factor

This video tutorial from MooMooMath and Science explains how to find the greatest common factor (GCF) for three or more numbers using a factor tree method. The instructor demonstrates the process of setting up a factor tree and organizing prime numbers into a chart to simplify finding the GCF. Two examples are provided: one for three numbers and another for four numbers, illustrating the method's application. The video concludes with a reminder to be kind.

What is the method used in the video to find the Greatest Common Factor?

• Using a factor tree

• Using a calculator

• Using a number line

• Using a graph

What is the purpose of creating a chart in the GCF method?

• To organize prime numbers

• To list all numbers

• To draw a graph

• To calculate the sum

Which prime numbers are used for the number 20 in the example?

• 2, 3, 5

• 2, 2, 5

• 2, 5, 7

• 3, 5, 7

How many numbers must be in a column to find the GCF for three numbers?

• Three

• One

• Two

• Four

What is the GCF of 20, 50, and 120?

• 20

• 15

• 10

• 5

In the second example, how many numbers are needed in a column to find the GCF?

• Two

• Three

• Four

• Five

What is the GCF of 12, 30, 18, and 26?

• 4

• 1

• 2

• 3

Which number is not a factor of 12 in the second example?

• 2

• 3

• 5

• 13

What is the final message of the video?

• Math is fun

• Practice makes perfect

• Kindness multiplies kindness

• Always double-check your work

What should you do after watching the video according to the narrator?

• Watch another video

• Solve more problems

• Take a break

• Be kind to someone