Least Common Multiple (LCM) Worksheet
Practice finding the least common multiple of two numbers with this worksheet.
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Least Common Multiple (LCM)
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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?
6
9
12
16
7. Which of the following is the LCM of 5 and 10?
5
10
15
20
8. The LCM of 2 and 4 is 8.
True
False
9. The LCM of 6 and 9 is 18.
True
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?
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