Math Practice Problems - Least Common Multiple

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Least Common Multiple - Sample Math Practice Problems

The math problems below can be generated by MathScore.com, a math practice program for schools and individual families. References to complexity and mode refer to the overall difficulty of the problems as they appear in the main program. In the main program, all problems are automatically graded and the difficulty adapts dynamically based on performance. Answers to these sample questions appear at the bottom of the page. This page does not grade your responses.

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Complexity=7

Find the least common multiple of each pair of numbers.

Complexity=10

Find the least common multiple of each pair of numbers.

Complexity=14

Find the least common multiple of each pair of numbers.

Complexity=16

Find the least common multiple of each pair of numbers.

Complexity=20

Find the least common multiple of each pair of numbers.

Complexity=40

Find the least common multiple of each pair of numbers.

Complexity=50

Find the least common multiple of each pair of numbers.

Answers

Complexity=4

Find the least common multiple of each pair of numbers.

#	Problem	Correct Answer	Your Answer
1	2, 3
Solution Multiples of 2: 2, 4, 6 Multiples of 3: 3, 6

#	Problem	Correct Answer	Your Answer
2	4, 2
Solution 2 divides evenly into 4. Therefore 4 is the LCM.

Complexity=7

Find the least common multiple of each pair of numbers.

#	Problem	Correct Answer	Your Answer
1	6, 2
Solution 2 divides evenly into 6. Therefore 6 is the LCM.

#	Problem	Correct Answer	Your Answer
2	7, 4
Solution Multiples of 7: 7, 14, 21, 28 Multiples of 4: 4, 8, 12, 16, 20, 24, 28

Complexity=10

Find the least common multiple of each pair of numbers.

#	Problem	Correct Answer	Your Answer
1	6, 10
Solution The GCF is 2. LCM(6,10) = product / gcf = (6 * 10) / 2. = (6/2) * 10 = 3 * 10. = 30.

#	Problem	Correct Answer	Your Answer
2	10, 5
Solution 5 divides evenly into 10. Therefore 10 is the LCM.

Complexity=14

Find the least common multiple of each pair of numbers.

#	Problem	Correct Answer	Your Answer
1	3, 12
Solution 3 divides evenly into 12. Therefore 12 is the LCM.

#	Problem	Correct Answer	Your Answer
2	3, 6
Solution 3 divides evenly into 6. Therefore 6 is the LCM.

Complexity=16

Find the least common multiple of each pair of numbers.

#	Problem	Correct Answer	Your Answer
1	12, 15
Solution The GCF is 3. LCM(12,15) = product / gcf = (12 * 15) / 3. = (12/3) * 15 = 4 * 15. = 60.

#	Problem	Correct Answer	Your Answer
2	8, 16
Solution 8 divides evenly into 16. Therefore 16 is the LCM.

Complexity=20

Find the least common multiple of each pair of numbers.

#	Problem	Correct Answer	Your Answer
1	16, 8
Solution 8 divides evenly into 16. Therefore 16 is the LCM.

#	Problem	Correct Answer	Your Answer
2	12, 20
Solution The GCF is 4. LCM(12,20) = product / gcf = (12 * 20) / 4. = (12/4) * 20 = 3 * 20. = 60.

Complexity=40

Find the least common multiple of each pair of numbers.

#	Problem	Correct Answer	Your Answer
1	24, 36
Solution The GCF is 12. LCM(24,36) = product / gcf = (24 * 36) / 12. = (24/12) * 36 = 2 * 36. = 72.

#	Problem	Correct Answer	Your Answer
2	36, 18
Solution 18 divides evenly into 36. Therefore 36 is the LCM.

Complexity=50

Find the least common multiple of each pair of numbers.

#	Problem	Correct Answer	Your Answer
1	40, 30
Solution The GCF is 10. LCM(40,30) = product / gcf = (40 * 30) / 10. = (40/10) * 30 = 4 * 30. = 120.

#	Problem	Correct Answer	Your Answer
2	50, 35
Solution The GCF is 5. LCM(50,35) = product / gcf = (50 * 35) / 5. = (50/5) * 35 = 10 * 35. = 350.

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