Greatest Common Factor

Greatest Common Factors

By Angie Moná

Greatest Common Factor

Lesson Objective: Students find common factors and the greatest common factor of numbers.

Subject | Subject

Some text here about the topic of discussion

The greatest common factor (GCF) of a set of whole numbers is the largest positive integer that divides evenly into all numbers with zero remainder.

​Greatest Common Factor

A common factor is a number that can be divided into two different numbers, without leaving a remainder.

​Common Factors

Factors​

Some text here about the topic of discussion

Multiple Choice

What are the factors of 12

• 1, 2, 3, 4, 5, 12

• 2, 3, 4, 6

• 1, 2, 3, 4, 6, 12

• 1, 3, 4, 12

Multiple Choice

What are the factors of 24?

• 2, 4, 6, 8, 12

• 1, 2, 3, 4, 6, 8, 10, 12, 24

• 1, 2, 3, 4, 5, 6, 7, 12, 24

• 12, 24, 3, 4, 2, 8, 6, 1

Fill in the Blanks

List the common factors of 12 and 24 in order from least to greatest separatd by a comma.

​Greatest Common Factor

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Multiple Choice

What is the GCF of 14 and 35?

• 5

• 2

• 7

• 8

Multiple Choice

What is the GCF of 29 and 57?

• 7

• 1

• 9

• 13

Fill in the Blanks

What is the GCF of 18 and 36?

Multiple Choice

What is the GCF of 22 and 55?

• 10

• 2

• 5

• 11

Fill in the Blanks

What is the GCF of 21 and 49?

Poll

How do you feel about this topic (GCF)?

• Great!! Ready for the test!

• Good, but I need a little more practice.

• I need another explanation.

• Totally clueless.