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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 44 and 55?

    44 · 55 · Lowest common multiple (LCM)

  2. 2. What is the lowest common multiple (LCM) of 24 and 40?

    24 · 40 · Lowest common multiple (LCM)

  3. 3. What is the lowest common multiple (LCM) of 40 and 56?

    40 · 56 · Lowest common multiple (LCM)

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

    36 · 48 · Lowest common multiple (LCM)

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

    22 · 55 · Lowest common multiple (LCM)

  6. 6. What is the lowest common multiple (LCM) of 4 and 6?

    4 · 6 · Lowest common multiple (LCM)

  7. 7. What is the lowest common multiple (LCM) of 48 and 60?

    48 · 60 · Lowest common multiple (LCM)

  8. 8. What is the lowest common multiple (LCM) of 15 and 20?

    15 · 20 · Lowest common multiple (LCM)

  9. 9. What is the lowest common multiple (LCM) of 12 and 42?

    12 · 42 · Lowest common multiple (LCM)

  10. 10. What is the lowest common multiple (LCM) of 12 and 30?

    12 · 30 · Lowest common multiple (LCM)

  11. 11. What is the lowest common multiple (LCM) of 12 and 18?

    12 · 18 · Lowest common multiple (LCM)

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

    18 · 27 · Lowest common multiple (LCM)
12 questions · Seed 64 · 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 44 and 55?

    220

    The highest common factor of 44 and 55 is 11, so LCM = (44 × 55) ÷ 11 = 220.

  2. 2. What is the lowest common multiple (LCM) of 24 and 40?

    120

    The highest common factor of 24 and 40 is 8, so LCM = (24 × 40) ÷ 8 = 120.

  3. 3. What is the lowest common multiple (LCM) of 40 and 56?

    280

    The highest common factor of 40 and 56 is 8, so LCM = (40 × 56) ÷ 8 = 280.

  4. 4. 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.

  5. 5. 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.

  6. 6. What is the lowest common multiple (LCM) of 4 and 6?

    12

    The highest common factor of 4 and 6 is 2, so LCM = (4 × 6) ÷ 2 = 12.

  7. 7. What is the lowest common multiple (LCM) of 48 and 60?

    240

    The highest common factor of 48 and 60 is 12, so LCM = (48 × 60) ÷ 12 = 240.

  8. 8. What is the lowest common multiple (LCM) of 15 and 20?

    60

    The highest common factor of 15 and 20 is 5, so LCM = (15 × 20) ÷ 5 = 60.

  9. 9. What is the lowest common multiple (LCM) of 12 and 42?

    84

    The highest common factor of 12 and 42 is 6, so LCM = (12 × 42) ÷ 6 = 84.

  10. 10. What is the lowest common multiple (LCM) of 12 and 30?

    60

    The highest common factor of 12 and 30 is 6, so LCM = (12 × 30) ÷ 6 = 60.

  11. 11. What is the lowest common multiple (LCM) of 12 and 18?

    36

    The highest common factor of 12 and 18 is 6, so LCM = (12 × 18) ÷ 6 = 36.

  12. 12. 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.

12 questions · Seed 64 · 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 44 and 55?

    44 · 55 · Lowest common multiple (LCM)

  2. 2. What is the lowest common multiple (LCM) of 24 and 40?

    24 · 40 · Lowest common multiple (LCM)

  3. 3. What is the lowest common multiple (LCM) of 40 and 56?

    40 · 56 · Lowest common multiple (LCM)

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

    36 · 48 · Lowest common multiple (LCM)

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

    22 · 55 · Lowest common multiple (LCM)

  6. 6. What is the lowest common multiple (LCM) of 4 and 6?

    4 · 6 · Lowest common multiple (LCM)

  7. 7. What is the lowest common multiple (LCM) of 48 and 60?

    48 · 60 · Lowest common multiple (LCM)

  8. 8. What is the lowest common multiple (LCM) of 15 and 20?

    15 · 20 · Lowest common multiple (LCM)

  9. 9. What is the lowest common multiple (LCM) of 12 and 42?

    12 · 42 · Lowest common multiple (LCM)

  10. 10. What is the lowest common multiple (LCM) of 12 and 30?

    12 · 30 · Lowest common multiple (LCM)

  11. 11. What is the lowest common multiple (LCM) of 12 and 18?

    12 · 18 · Lowest common multiple (LCM)

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

    18 · 27 · Lowest common multiple (LCM)
12 questions · Seed 64 · 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 44 and 55?

    220

    The highest common factor of 44 and 55 is 11, so LCM = (44 × 55) ÷ 11 = 220.

  2. 2. What is the lowest common multiple (LCM) of 24 and 40?

    120

    The highest common factor of 24 and 40 is 8, so LCM = (24 × 40) ÷ 8 = 120.

  3. 3. What is the lowest common multiple (LCM) of 40 and 56?

    280

    The highest common factor of 40 and 56 is 8, so LCM = (40 × 56) ÷ 8 = 280.

  4. 4. 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.

  5. 5. 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.

  6. 6. What is the lowest common multiple (LCM) of 4 and 6?

    12

    The highest common factor of 4 and 6 is 2, so LCM = (4 × 6) ÷ 2 = 12.

  7. 7. What is the lowest common multiple (LCM) of 48 and 60?

    240

    The highest common factor of 48 and 60 is 12, so LCM = (48 × 60) ÷ 12 = 240.

  8. 8. What is the lowest common multiple (LCM) of 15 and 20?

    60

    The highest common factor of 15 and 20 is 5, so LCM = (15 × 20) ÷ 5 = 60.

  9. 9. What is the lowest common multiple (LCM) of 12 and 42?

    84

    The highest common factor of 12 and 42 is 6, so LCM = (12 × 42) ÷ 6 = 84.

  10. 10. What is the lowest common multiple (LCM) of 12 and 30?

    60

    The highest common factor of 12 and 30 is 6, so LCM = (12 × 30) ÷ 6 = 60.

  11. 11. What is the lowest common multiple (LCM) of 12 and 18?

    36

    The highest common factor of 12 and 18 is 6, so LCM = (12 × 18) ÷ 6 = 36.

  12. 12. 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.

12 questions · Seed 64 · Age guidance, not curriculum certification