Greatest Common Factor and Factors

This video tutorial covers the concept of factors and multiples, focusing on understanding and finding the greatest common factor (GCF). It explains the method to find GCF using factor partners and provides practical applications, such as determining the number of identical cookie boxes that can be made from a given number of cookies. The tutorial also discusses prime numbers and their GCF, concluding with a preview of the next lesson on the distributive property.

What is a factor of a number?

• A number that is added to another number

• A number that is subtracted from another number

• A number that divides another number evenly

• A number that is multiplied by itself

Which of the following is the greatest common factor of 12 and 6?

• 4

• 3

• 6

• 2

Which of the following is NOT a factor of 20?

• 9

• 5

• 4

• 2

If a baker has 10 vanilla and 15 chocolate cookies, what is the greatest number of identical boxes he can make?

• 1

• 3

• 5

• 10

What is the greatest common factor of 24 and 32?

• 6

• 4

• 12

• 8

What is the greatest common factor of 36 and 45?

• 12

• 9

• 6

• 3

Which of the following numbers is a prime number?

• 4

• 6

• 7

• 9

Which of the following pairs of numbers has a greatest common factor of 1?

• 18 and 24

• 10 and 15

• 5 and 7

• 8 and 12

What is the greatest common factor of 21 and 22?

• 7

• 1

• 2

• 3

What is the greatest common factor of 5 and 7?

• 1

• 2

• 5

• 7