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MathsAges 10-12

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 10-12

Lowest common multiple (LCM)

Take your time. Show your thinking.

  1. 1. What is the lowest common multiple (LCM) of 33 and 44?

    33 · 44 · Lowest common multiple (LCM)

  2. 2. What is the lowest common multiple (LCM) of 20 and 28?

    20 · 28 · Lowest common multiple (LCM)

  3. 3. What is the lowest common multiple (LCM) of 6 and 15?

    6 · 15 · Lowest common multiple (LCM)

  4. 4. What is the lowest common multiple (LCM) of 15 and 35?

    15 · 35 · Lowest common multiple (LCM)

  5. 5. What is the lowest common multiple (LCM) of 50 and 60?

    50 · 60 · Lowest common multiple (LCM)

  6. 6. What is the lowest common multiple (LCM) of 60 and 72?

    60 · 72 · Lowest common multiple (LCM)

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

    24 · 84 · Lowest common multiple (LCM)

  8. 8. What is the lowest common multiple (LCM) of 21 and 49?

    21 · 49 · Lowest common multiple (LCM)

  9. 9. What is the lowest common multiple (LCM) of 48 and 84?

    48 · 84 · Lowest common multiple (LCM)

  10. 10. What is the lowest common multiple (LCM) of 20 and 30?

    20 · 30 · Lowest common multiple (LCM)

  11. 11. What is the lowest common multiple (LCM) of 40 and 48?

    40 · 48 · Lowest common multiple (LCM)

  12. 12. What is the lowest common multiple (LCM) of 16 and 24?

    16 · 24 · Lowest common multiple (LCM)
12 questions · Seed 59 · Age guidance, not curriculum certification
View the answer key
Worksheet StudioAnswer key · Ages 10-12

Lowest common multiple (LCM)

Answers and reasoning. Review before teaching.

  1. 1. What is the lowest common multiple (LCM) of 33 and 44?

    132

    The highest common factor of 33 and 44 is 11, so LCM = (33 × 44) ÷ 11 = 132.

  2. 2. What is the lowest common multiple (LCM) of 20 and 28?

    140

    The highest common factor of 20 and 28 is 4, so LCM = (20 × 28) ÷ 4 = 140.

  3. 3. What is the lowest common multiple (LCM) of 6 and 15?

    30

    The highest common factor of 6 and 15 is 3, so LCM = (6 × 15) ÷ 3 = 30.

  4. 4. What is the lowest common multiple (LCM) of 15 and 35?

    105

    The highest common factor of 15 and 35 is 5, so LCM = (15 × 35) ÷ 5 = 105.

  5. 5. What is the lowest common multiple (LCM) of 50 and 60?

    300

    The highest common factor of 50 and 60 is 10, so LCM = (50 × 60) ÷ 10 = 300.

  6. 6. What is the lowest common multiple (LCM) of 60 and 72?

    360

    The highest common factor of 60 and 72 is 12, so LCM = (60 × 72) ÷ 12 = 360.

  7. 7. 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.

  8. 8. What is the lowest common multiple (LCM) of 21 and 49?

    147

    The highest common factor of 21 and 49 is 7, so LCM = (21 × 49) ÷ 7 = 147.

  9. 9. What is the lowest common multiple (LCM) of 48 and 84?

    336

    The highest common factor of 48 and 84 is 12, so LCM = (48 × 84) ÷ 12 = 336.

  10. 10. What is the lowest common multiple (LCM) of 20 and 30?

    60

    The highest common factor of 20 and 30 is 10, so LCM = (20 × 30) ÷ 10 = 60.

  11. 11. What is the lowest common multiple (LCM) of 40 and 48?

    240

    The highest common factor of 40 and 48 is 8, so LCM = (40 × 48) ÷ 8 = 240.

  12. 12. What is the lowest common multiple (LCM) of 16 and 24?

    48

    The highest common factor of 16 and 24 is 8, so LCM = (16 × 24) ÷ 8 = 48.

12 questions · Seed 59 · Age guidance, not curriculum certification
Worksheet StudioPractice pack · Ages 10-12

Lowest common multiple (LCM)

Take your time. Show your thinking.

  1. 1. What is the lowest common multiple (LCM) of 33 and 44?

    33 · 44 · Lowest common multiple (LCM)

  2. 2. What is the lowest common multiple (LCM) of 20 and 28?

    20 · 28 · Lowest common multiple (LCM)

  3. 3. What is the lowest common multiple (LCM) of 6 and 15?

    6 · 15 · Lowest common multiple (LCM)

  4. 4. What is the lowest common multiple (LCM) of 15 and 35?

    15 · 35 · Lowest common multiple (LCM)

  5. 5. What is the lowest common multiple (LCM) of 50 and 60?

    50 · 60 · Lowest common multiple (LCM)

  6. 6. What is the lowest common multiple (LCM) of 60 and 72?

    60 · 72 · Lowest common multiple (LCM)

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

    24 · 84 · Lowest common multiple (LCM)

  8. 8. What is the lowest common multiple (LCM) of 21 and 49?

    21 · 49 · Lowest common multiple (LCM)

  9. 9. What is the lowest common multiple (LCM) of 48 and 84?

    48 · 84 · Lowest common multiple (LCM)

  10. 10. What is the lowest common multiple (LCM) of 20 and 30?

    20 · 30 · Lowest common multiple (LCM)

  11. 11. What is the lowest common multiple (LCM) of 40 and 48?

    40 · 48 · Lowest common multiple (LCM)

  12. 12. What is the lowest common multiple (LCM) of 16 and 24?

    16 · 24 · Lowest common multiple (LCM)
12 questions · Seed 59 · Age guidance, not curriculum certification
Worksheet StudioAnswer key · Ages 10-12

Lowest common multiple (LCM)

Answers and reasoning. Review before teaching.

  1. 1. What is the lowest common multiple (LCM) of 33 and 44?

    132

    The highest common factor of 33 and 44 is 11, so LCM = (33 × 44) ÷ 11 = 132.

  2. 2. What is the lowest common multiple (LCM) of 20 and 28?

    140

    The highest common factor of 20 and 28 is 4, so LCM = (20 × 28) ÷ 4 = 140.

  3. 3. What is the lowest common multiple (LCM) of 6 and 15?

    30

    The highest common factor of 6 and 15 is 3, so LCM = (6 × 15) ÷ 3 = 30.

  4. 4. What is the lowest common multiple (LCM) of 15 and 35?

    105

    The highest common factor of 15 and 35 is 5, so LCM = (15 × 35) ÷ 5 = 105.

  5. 5. What is the lowest common multiple (LCM) of 50 and 60?

    300

    The highest common factor of 50 and 60 is 10, so LCM = (50 × 60) ÷ 10 = 300.

  6. 6. What is the lowest common multiple (LCM) of 60 and 72?

    360

    The highest common factor of 60 and 72 is 12, so LCM = (60 × 72) ÷ 12 = 360.

  7. 7. 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.

  8. 8. What is the lowest common multiple (LCM) of 21 and 49?

    147

    The highest common factor of 21 and 49 is 7, so LCM = (21 × 49) ÷ 7 = 147.

  9. 9. What is the lowest common multiple (LCM) of 48 and 84?

    336

    The highest common factor of 48 and 84 is 12, so LCM = (48 × 84) ÷ 12 = 336.

  10. 10. What is the lowest common multiple (LCM) of 20 and 30?

    60

    The highest common factor of 20 and 30 is 10, so LCM = (20 × 30) ÷ 10 = 60.

  11. 11. What is the lowest common multiple (LCM) of 40 and 48?

    240

    The highest common factor of 40 and 48 is 8, so LCM = (40 × 48) ÷ 8 = 240.

  12. 12. What is the lowest common multiple (LCM) of 16 and 24?

    48

    The highest common factor of 16 and 24 is 8, so LCM = (16 × 24) ÷ 8 = 48.

12 questions · Seed 59 · Age guidance, not curriculum certification