Greatest Common Factor

The video tutorial explains the concept of factors and the greatest common factor (GCF). It provides a step-by-step guide to finding the GCF of two numbers, using examples with the numbers 15 and 45, and 24 and 36. The process involves listing all factors of each number, identifying common factors, and selecting the greatest one. The tutorial emphasizes the importance of organizing factors from least to greatest and highlights the GCF as the largest common factor between two numbers.

What is a factor in a multiplication equation?

• A number that is subtracted from another number

• A number that is multiplied by another number

• A number that is added to another number

• A number that is divided by another number

Which of the following is the greatest common factor of 15 and 45?

• 5

• 20

• 10

• 15

What is the first step in finding the greatest common factor of two numbers?

• Subtract the smaller number from the larger number

• Multiply the numbers

• List all the factors of each number

• Add the numbers together

Which number is the greatest common factor of 24 and 36?

• 10

• 8

• 12

• 6

When listing factors, what should you do if a factor appears more than once?

• Write it twice

• Write it only once

• Ignore it completely

• Write it multiple times