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

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 13-15

Lowest common multiple (LCM)

Take your time. Show your thinking.

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

    27 · 36 · Lowest common multiple (LCM)

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

    10 · 25 · Lowest common multiple (LCM)

  3. 3. What is the lowest common multiple (LCM) of 35 and 49?

    35 · 49 · 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 36 and 60?

    36 · 60 · Lowest common multiple (LCM)

  6. 6. What is the lowest common multiple (LCM) of 24 and 36?

    24 · 36 · Lowest common multiple (LCM)

  7. 7. What is the lowest common multiple (LCM) of 9 and 15?

    9 · 15 · Lowest common multiple (LCM)

  8. 8. What is the lowest common multiple (LCM) of 25 and 35?

    25 · 35 · Lowest common multiple (LCM)

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

    15 · 18 · Lowest common multiple (LCM)

  10. 10. What is the lowest common multiple (LCM) of 12 and 21?

    12 · 21 · Lowest common multiple (LCM)

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

    24 · 84 · Lowest common multiple (LCM)

  12. 12. What is the lowest common multiple (LCM) of 16 and 28?

    16 · 28 · Lowest common multiple (LCM)
12 questions · Seed 104735 · 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 27 and 36?

    108

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

  2. 2. 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.

  3. 3. What is the lowest common multiple (LCM) of 35 and 49?

    245

    The highest common factor of 35 and 49 is 7, so LCM = (35 × 49) ÷ 7 = 245.

  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 36 and 60?

    180

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

  6. 6. What is the lowest common multiple (LCM) of 24 and 36?

    72

    The highest common factor of 24 and 36 is 12, so LCM = (24 × 36) ÷ 12 = 72.

  7. 7. What is the lowest common multiple (LCM) of 9 and 15?

    45

    The highest common factor of 9 and 15 is 3, so LCM = (9 × 15) ÷ 3 = 45.

  8. 8. What is the lowest common multiple (LCM) of 25 and 35?

    175

    The highest common factor of 25 and 35 is 5, so LCM = (25 × 35) ÷ 5 = 175.

  9. 9. 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.

  10. 10. What is the lowest common multiple (LCM) of 12 and 21?

    84

    The highest common factor of 12 and 21 is 3, so LCM = (12 × 21) ÷ 3 = 84.

  11. 11. 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.

  12. 12. What is the lowest common multiple (LCM) of 16 and 28?

    112

    The highest common factor of 16 and 28 is 4, so LCM = (16 × 28) ÷ 4 = 112.

12 questions · Seed 104735 · 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 27 and 36?

    27 · 36 · Lowest common multiple (LCM)

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

    10 · 25 · Lowest common multiple (LCM)

  3. 3. What is the lowest common multiple (LCM) of 35 and 49?

    35 · 49 · 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 36 and 60?

    36 · 60 · Lowest common multiple (LCM)

  6. 6. What is the lowest common multiple (LCM) of 24 and 36?

    24 · 36 · Lowest common multiple (LCM)

  7. 7. What is the lowest common multiple (LCM) of 9 and 15?

    9 · 15 · Lowest common multiple (LCM)

  8. 8. What is the lowest common multiple (LCM) of 25 and 35?

    25 · 35 · Lowest common multiple (LCM)

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

    15 · 18 · Lowest common multiple (LCM)

  10. 10. What is the lowest common multiple (LCM) of 12 and 21?

    12 · 21 · Lowest common multiple (LCM)

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

    24 · 84 · Lowest common multiple (LCM)

  12. 12. What is the lowest common multiple (LCM) of 16 and 28?

    16 · 28 · Lowest common multiple (LCM)
12 questions · Seed 104735 · 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 27 and 36?

    108

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

  2. 2. 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.

  3. 3. What is the lowest common multiple (LCM) of 35 and 49?

    245

    The highest common factor of 35 and 49 is 7, so LCM = (35 × 49) ÷ 7 = 245.

  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 36 and 60?

    180

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

  6. 6. What is the lowest common multiple (LCM) of 24 and 36?

    72

    The highest common factor of 24 and 36 is 12, so LCM = (24 × 36) ÷ 12 = 72.

  7. 7. What is the lowest common multiple (LCM) of 9 and 15?

    45

    The highest common factor of 9 and 15 is 3, so LCM = (9 × 15) ÷ 3 = 45.

  8. 8. What is the lowest common multiple (LCM) of 25 and 35?

    175

    The highest common factor of 25 and 35 is 5, so LCM = (25 × 35) ÷ 5 = 175.

  9. 9. 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.

  10. 10. What is the lowest common multiple (LCM) of 12 and 21?

    84

    The highest common factor of 12 and 21 is 3, so LCM = (12 × 21) ÷ 3 = 84.

  11. 11. 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.

  12. 12. What is the lowest common multiple (LCM) of 16 and 28?

    112

    The highest common factor of 16 and 28 is 4, so LCM = (16 × 28) ÷ 4 = 112.

12 questions · Seed 104735 · Age guidance, not curriculum certification