Small practice. Bright discoveries.Explore the free starter collection
worksheetstudio.
Sign in
Back to worksheets
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.

New variationTry interactive challengeBrowse templates
Age band:Ages 10-12Ages 13-15

Choose “Save as PDF” to keep a copy. Use your browser’s paper setting for A4 or Letter.

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 36 and 60?

    36 · 60 · Lowest common multiple (LCM)

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

    55 · 66 · Lowest common multiple (LCM)

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

    9 · 21 · Lowest common multiple (LCM)

  4. 4. What is the lowest common multiple (LCM) of 16 and 56?

    16 · 56 · Lowest common multiple (LCM)

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

    40 · 48 · Lowest common multiple (LCM)

  6. 6. What is the lowest common multiple (LCM) of 30 and 70?

    30 · 70 · Lowest common multiple (LCM)

  7. 7. What is the lowest common multiple (LCM) of 27 and 63?

    27 · 63 · Lowest common multiple (LCM)

  8. 8. What is the lowest common multiple (LCM) of 24 and 56?

    24 · 56 · Lowest common multiple (LCM)

  9. 9. What is the lowest common multiple (LCM) of 6 and 14?

    6 · 14 · Lowest common multiple (LCM)

  10. 10. What is the lowest common multiple (LCM) of 10 and 25?

    10 · 25 · Lowest common multiple (LCM)

  11. 11. What is the lowest common multiple (LCM) of 44 and 77?

    44 · 77 · Lowest common multiple (LCM)

  12. 12. What is the lowest common multiple (LCM) of 4 and 10?

    4 · 10 · Lowest common multiple (LCM)
12 questions · Seed 46 · 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 36 and 60?

    180

    The highest common factor of 36 and 60 is 12, so LCM = (36 × 60) ÷ 12 = 180.

  2. 2. 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.

  3. 3. 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.

  4. 4. What is the lowest common multiple (LCM) of 16 and 56?

    112

    The highest common factor of 16 and 56 is 8, so LCM = (16 × 56) ÷ 8 = 112.

  5. 5. 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.

  6. 6. What is the lowest common multiple (LCM) of 30 and 70?

    210

    The highest common factor of 30 and 70 is 10, so LCM = (30 × 70) ÷ 10 = 210.

  7. 7. What is the lowest common multiple (LCM) of 27 and 63?

    189

    The highest common factor of 27 and 63 is 9, so LCM = (27 × 63) ÷ 9 = 189.

  8. 8. What is the lowest common multiple (LCM) of 24 and 56?

    168

    The highest common factor of 24 and 56 is 8, so LCM = (24 × 56) ÷ 8 = 168.

  9. 9. What is the lowest common multiple (LCM) of 6 and 14?

    42

    The highest common factor of 6 and 14 is 2, so LCM = (6 × 14) ÷ 2 = 42.

  10. 10. What is the lowest common multiple (LCM) of 10 and 25?

    50

    The highest common factor of 10 and 25 is 5, so LCM = (10 × 25) ÷ 5 = 50.

  11. 11. What is the lowest common multiple (LCM) of 44 and 77?

    308

    The highest common factor of 44 and 77 is 11, so LCM = (44 × 77) ÷ 11 = 308.

  12. 12. What is the lowest common multiple (LCM) of 4 and 10?

    20

    The highest common factor of 4 and 10 is 2, so LCM = (4 × 10) ÷ 2 = 20.

12 questions · Seed 46 · 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 36 and 60?

    36 · 60 · Lowest common multiple (LCM)

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

    55 · 66 · Lowest common multiple (LCM)

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

    9 · 21 · Lowest common multiple (LCM)

  4. 4. What is the lowest common multiple (LCM) of 16 and 56?

    16 · 56 · Lowest common multiple (LCM)

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

    40 · 48 · Lowest common multiple (LCM)

  6. 6. What is the lowest common multiple (LCM) of 30 and 70?

    30 · 70 · Lowest common multiple (LCM)

  7. 7. What is the lowest common multiple (LCM) of 27 and 63?

    27 · 63 · Lowest common multiple (LCM)

  8. 8. What is the lowest common multiple (LCM) of 24 and 56?

    24 · 56 · Lowest common multiple (LCM)

  9. 9. What is the lowest common multiple (LCM) of 6 and 14?

    6 · 14 · Lowest common multiple (LCM)

  10. 10. What is the lowest common multiple (LCM) of 10 and 25?

    10 · 25 · Lowest common multiple (LCM)

  11. 11. What is the lowest common multiple (LCM) of 44 and 77?

    44 · 77 · Lowest common multiple (LCM)

  12. 12. What is the lowest common multiple (LCM) of 4 and 10?

    4 · 10 · Lowest common multiple (LCM)
12 questions · Seed 46 · 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 36 and 60?

    180

    The highest common factor of 36 and 60 is 12, so LCM = (36 × 60) ÷ 12 = 180.

  2. 2. 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.

  3. 3. 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.

  4. 4. What is the lowest common multiple (LCM) of 16 and 56?

    112

    The highest common factor of 16 and 56 is 8, so LCM = (16 × 56) ÷ 8 = 112.

  5. 5. 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.

  6. 6. What is the lowest common multiple (LCM) of 30 and 70?

    210

    The highest common factor of 30 and 70 is 10, so LCM = (30 × 70) ÷ 10 = 210.

  7. 7. What is the lowest common multiple (LCM) of 27 and 63?

    189

    The highest common factor of 27 and 63 is 9, so LCM = (27 × 63) ÷ 9 = 189.

  8. 8. What is the lowest common multiple (LCM) of 24 and 56?

    168

    The highest common factor of 24 and 56 is 8, so LCM = (24 × 56) ÷ 8 = 168.

  9. 9. What is the lowest common multiple (LCM) of 6 and 14?

    42

    The highest common factor of 6 and 14 is 2, so LCM = (6 × 14) ÷ 2 = 42.

  10. 10. What is the lowest common multiple (LCM) of 10 and 25?

    50

    The highest common factor of 10 and 25 is 5, so LCM = (10 × 25) ÷ 5 = 50.

  11. 11. What is the lowest common multiple (LCM) of 44 and 77?

    308

    The highest common factor of 44 and 77 is 11, so LCM = (44 × 77) ÷ 11 = 308.

  12. 12. What is the lowest common multiple (LCM) of 4 and 10?

    20

    The highest common factor of 4 and 10 is 2, so LCM = (4 × 10) ÷ 2 = 20.

12 questions · Seed 46 · Age guidance, not curriculum certification