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Least Common Multiple (LCM) Worksheet

Practice finding the least common multiple of two numbers with this worksheet.

Grade 4 Math Number SenseLeast Common Factor
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Includes

Fill in the Blanks2 Short AnswerMultiple ChoiceTrue / False

Standards

CCSS.MATH.CONTENT.4.OA.B.4

Topics

mathgrade 4least common multipleLCMnumber sense
7 sections · Free to use · Printable
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Least Common Multiple (LCM)

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Date:

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

1. List the first five multiples of 3:  

2. List the first five multiples of 5:  

3. List the first six multiples of 4:  

4. Find the LCM of 2 and 3.

5. Find the LCM of 4 and 6.

6. What is the LCM of 3 and 4?

a

6

b

9

c

12

d

16

7. Which of the following is the LCM of 5 and 10?

a

5

b

10

c

15

d

20

8. The LCM of 2 and 4 is 8.

T

True

F

False

9. The LCM of 6 and 9 is 18.

T

True

F

False

10. Two friends, Alex and Ben, are running laps around a track. Alex finishes a lap every 3 minutes, and Ben finishes a lap every 5 minutes. If they start at the same time, how many minutes will it be until they cross the starting line together again?