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MathsAges 13-15

Lowest common multiple (LCM)

Find the lowest common multiple (LCM) shared by two whole numbers. Review suitability for your learners before teaching.

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Age band:Ages 10-12Ages 13-15

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Worksheet StudioPractice pack · Ages 13-15

Lowest common multiple (LCM)

Take your time. Show your thinking.

  1. 1. What is the lowest common multiple (LCM) of 24 and 84?

    24 · 84 · Lowest common multiple (LCM)

  2. 2. What is the lowest common multiple (LCM) of 18 and 27?

    18 · 27 · Lowest common multiple (LCM)

  3. 3. What is the lowest common multiple (LCM) of 12 and 20?

    12 · 20 · Lowest common multiple (LCM)

  4. 4. What is the lowest common multiple (LCM) of 55 and 66?

    55 · 66 · Lowest common multiple (LCM)

  5. 5. What is the lowest common multiple (LCM) of 36 and 48?

    36 · 48 · Lowest common multiple (LCM)

  6. 6. What is the lowest common multiple (LCM) of 8 and 12?

    8 · 12 · Lowest common multiple (LCM)

  7. 7. What is the lowest common multiple (LCM) of 15 and 18?

    15 · 18 · Lowest common multiple (LCM)

  8. 8. What is the lowest common multiple (LCM) of 55 and 77?

    55 · 77 · Lowest common multiple (LCM)

  9. 9. What is the lowest common multiple (LCM) of 9 and 21?

    9 · 21 · Lowest common multiple (LCM)

  10. 10. What is the lowest common multiple (LCM) of 18 and 63?

    18 · 63 · Lowest common multiple (LCM)

  11. 11. What is the lowest common multiple (LCM) of 27 and 36?

    27 · 36 · Lowest common multiple (LCM)

  12. 12. What is the lowest common multiple (LCM) of 22 and 55?

    22 · 55 · Lowest common multiple (LCM)
12 questions · Seed 66 · Age guidance, not curriculum certification
View the answer key
Worksheet StudioAnswer key · Ages 13-15

Lowest common multiple (LCM)

Answers and reasoning. Review before teaching.

  1. 1. What is the lowest common multiple (LCM) of 24 and 84?

    168

    The highest common factor of 24 and 84 is 12, so LCM = (24 × 84) ÷ 12 = 168.

  2. 2. What is the lowest common multiple (LCM) of 18 and 27?

    54

    The highest common factor of 18 and 27 is 9, so LCM = (18 × 27) ÷ 9 = 54.

  3. 3. What is the lowest common multiple (LCM) of 12 and 20?

    60

    The highest common factor of 12 and 20 is 4, so LCM = (12 × 20) ÷ 4 = 60.

  4. 4. What is the lowest common multiple (LCM) of 55 and 66?

    330

    The highest common factor of 55 and 66 is 11, so LCM = (55 × 66) ÷ 11 = 330.

  5. 5. What is the lowest common multiple (LCM) of 36 and 48?

    144

    The highest common factor of 36 and 48 is 12, so LCM = (36 × 48) ÷ 12 = 144.

  6. 6. What is the lowest common multiple (LCM) of 8 and 12?

    24

    The highest common factor of 8 and 12 is 4, so LCM = (8 × 12) ÷ 4 = 24.

  7. 7. What is the lowest common multiple (LCM) of 15 and 18?

    90

    The highest common factor of 15 and 18 is 3, so LCM = (15 × 18) ÷ 3 = 90.

  8. 8. What is the lowest common multiple (LCM) of 55 and 77?

    385

    The highest common factor of 55 and 77 is 11, so LCM = (55 × 77) ÷ 11 = 385.

  9. 9. What is the lowest common multiple (LCM) of 9 and 21?

    63

    The highest common factor of 9 and 21 is 3, so LCM = (9 × 21) ÷ 3 = 63.

  10. 10. What is the lowest common multiple (LCM) of 18 and 63?

    126

    The highest common factor of 18 and 63 is 9, so LCM = (18 × 63) ÷ 9 = 126.

  11. 11. What is the lowest common multiple (LCM) of 27 and 36?

    108

    The highest common factor of 27 and 36 is 9, so LCM = (27 × 36) ÷ 9 = 108.

  12. 12. What is the lowest common multiple (LCM) of 22 and 55?

    110

    The highest common factor of 22 and 55 is 11, so LCM = (22 × 55) ÷ 11 = 110.

12 questions · Seed 66 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 13-15

Lowest common multiple (LCM)

Take your time. Show your thinking.

  1. 1. What is the lowest common multiple (LCM) of 24 and 84?

    24 · 84 · Lowest common multiple (LCM)

  2. 2. What is the lowest common multiple (LCM) of 18 and 27?

    18 · 27 · Lowest common multiple (LCM)

  3. 3. What is the lowest common multiple (LCM) of 12 and 20?

    12 · 20 · Lowest common multiple (LCM)

  4. 4. What is the lowest common multiple (LCM) of 55 and 66?

    55 · 66 · Lowest common multiple (LCM)

  5. 5. What is the lowest common multiple (LCM) of 36 and 48?

    36 · 48 · Lowest common multiple (LCM)

  6. 6. What is the lowest common multiple (LCM) of 8 and 12?

    8 · 12 · Lowest common multiple (LCM)

  7. 7. What is the lowest common multiple (LCM) of 15 and 18?

    15 · 18 · Lowest common multiple (LCM)

  8. 8. What is the lowest common multiple (LCM) of 55 and 77?

    55 · 77 · Lowest common multiple (LCM)

  9. 9. What is the lowest common multiple (LCM) of 9 and 21?

    9 · 21 · Lowest common multiple (LCM)

  10. 10. What is the lowest common multiple (LCM) of 18 and 63?

    18 · 63 · Lowest common multiple (LCM)

  11. 11. What is the lowest common multiple (LCM) of 27 and 36?

    27 · 36 · Lowest common multiple (LCM)

  12. 12. What is the lowest common multiple (LCM) of 22 and 55?

    22 · 55 · Lowest common multiple (LCM)
12 questions · Seed 66 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 13-15

Lowest common multiple (LCM)

Answers and reasoning. Review before teaching.

  1. 1. What is the lowest common multiple (LCM) of 24 and 84?

    168

    The highest common factor of 24 and 84 is 12, so LCM = (24 × 84) ÷ 12 = 168.

  2. 2. What is the lowest common multiple (LCM) of 18 and 27?

    54

    The highest common factor of 18 and 27 is 9, so LCM = (18 × 27) ÷ 9 = 54.

  3. 3. What is the lowest common multiple (LCM) of 12 and 20?

    60

    The highest common factor of 12 and 20 is 4, so LCM = (12 × 20) ÷ 4 = 60.

  4. 4. What is the lowest common multiple (LCM) of 55 and 66?

    330

    The highest common factor of 55 and 66 is 11, so LCM = (55 × 66) ÷ 11 = 330.

  5. 5. What is the lowest common multiple (LCM) of 36 and 48?

    144

    The highest common factor of 36 and 48 is 12, so LCM = (36 × 48) ÷ 12 = 144.

  6. 6. What is the lowest common multiple (LCM) of 8 and 12?

    24

    The highest common factor of 8 and 12 is 4, so LCM = (8 × 12) ÷ 4 = 24.

  7. 7. What is the lowest common multiple (LCM) of 15 and 18?

    90

    The highest common factor of 15 and 18 is 3, so LCM = (15 × 18) ÷ 3 = 90.

  8. 8. What is the lowest common multiple (LCM) of 55 and 77?

    385

    The highest common factor of 55 and 77 is 11, so LCM = (55 × 77) ÷ 11 = 385.

  9. 9. What is the lowest common multiple (LCM) of 9 and 21?

    63

    The highest common factor of 9 and 21 is 3, so LCM = (9 × 21) ÷ 3 = 63.

  10. 10. What is the lowest common multiple (LCM) of 18 and 63?

    126

    The highest common factor of 18 and 63 is 9, so LCM = (18 × 63) ÷ 9 = 126.

  11. 11. What is the lowest common multiple (LCM) of 27 and 36?

    108

    The highest common factor of 27 and 36 is 9, so LCM = (27 × 36) ÷ 9 = 108.

  12. 12. What is the lowest common multiple (LCM) of 22 and 55?

    110

    The highest common factor of 22 and 55 is 11, so LCM = (22 × 55) ÷ 11 = 110.

12 questions · Seed 66 · Age guidance, not curriculum certification