LCM and GCF Practice Worksheet

Practice finding the Least Common Multiple (LCM) and Greatest Common Factor (GCF) of numbers for Grade 5 Math.

Grade 5 Math Number SenseNumber TheoryLCM and GCF

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Includes

2 Short Answer2 Fill in the Blanks2 Multiple Choice2 True / False

Standards

CCSS.MATH.CONTENT.6.NS.B.4

Topics

mathgrade 5lcmgcfnumber sense

10 sections · Free to use · Printable

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LCM and GCF Practice

Name:

Date:

Score:

Read each question carefully and answer to the best of your ability. Show your work for full credit.

1. List the first five multiples of 4 and 6.

Multiples of 4:

Multiples of 6:

What is the Least Common Multiple (LCM) of 4 and 6?

2. The LCM of 3 and 5 is .

3. The LCM of 8 and 12 is .

4. The LCM of 7 and 2 is .

5. List all the factors of 18 and 24.

Factors of 18:

Factors of 24:

What is the Greatest Common Factor (GCF) of 18 and 24?

6. The GCF of 10 and 15 is .

7. The GCF of 21 and 35 is .

8. The GCF of 16 and 40 is .

9. Which of the following is the LCM of 9 and 12?

10. Which of the following is the GCF of 30 and 45?

11. The LCM of two prime numbers is always their product.

True

False

12. The GCF of two numbers is always less than or equal to the smaller of the two numbers.

True

False

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