Least Common Multiple (LCM) Worksheet

Practice finding the least common multiple of two or more numbers.

Grade 7 Math Number SenseLeast Common Factor

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Includes

Multiple ChoiceFill in the BlanksShort AnswerTrue / False2 Custom

Standards

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

Topics

mathnumber senselcmgrade 7

8 sections · Free to use · Printable

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Least Common Multiple (LCM) Practice

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Read each question carefully and find the Least Common Multiple (LCM) for the given numbers. Show your work where indicated.

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

2. Find the LCM of 3, 5, and 10.

3. The multiples of 8 are 8, 16, 24, 32, 40, 48, ... The multiples of 12 are 12, 24, 36, 48, ... The LCM of 8 and 12 is .

4. To find the LCM of two prime numbers, you simply them.

5. Explain in your own words what the Least Common Multiple (LCM) means.

6. Find the LCM of 7 and 9. Show your work.

7. The LCM of any two numbers is always greater than or equal to both numbers.

True

False

8. The LCM of 15 and 20 is 60.

True

False

9. Two bells ring at different intervals. One bell rings every 8 minutes, and the other rings every 10 minutes. If they both ring at 1:00 PM, at what time will they ring together again?

10. Use the number line below to help visualize the common multiples of 2 and 3. Circle the common multiples and identify the LCM.

LCM =