GCF & LCM (Challenging)

What is the least common multiple?

• The smallest multiple that two or more numbers share.

• The largest multiple that two or more numbers share.

• The smallest factor that two or more numbers share.

• The biggest factor that two or more numbers share.

What is the greatest common factor?

• The largest multiple that two or more numbers share.

• The smallest multiple that two or more numbers share.

• The smallest factor that two or more numbers share.

• The greatest factor that two or more numbers share.

What strategy is used to find the GCF?

• T-Chart

• Area Model

• List of Multiples

• Addition

What strategy is used to find the LCM?

• T-Chart

• Listing the Multiples

• Partial Quotient

• Area Model

List the factors of 27 from smallest to greatest.

(Please don't forget to put spaces between the numbers!)

List the factors of 30 from smallest to greatest.

(Please don't forget to put spaces between the numbers!)

What is the Greatest Common Factor of 27 and 30?

List the first ten multiples of 4 from least to greatest.

(Hint: The last number will be 40)

List the first ten multiples of 9 from least to greatest.

(Hint: The last number will be 90)

What is the LCM of 4 and 9?