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Greatest common factor of two numbers to 100

Year 7 maths · Fieldbook Learning

Name ______________________ Date __________

Find the largest number that divides both numbers evenly. Listing the factors of each number helps.

  1. Find the greatest common factor of 10 and 6.
  2. Find the greatest common factor of 8 and 4.
  3. What is the GCF of 4 and 8?
  4. What is the GCF of 2 and 6?
  5. What is the largest number that divides both 12 and 8 evenly?
  6. What is the GCF of 3 and 15?
  7. Find the greatest common factor of 18 and 2.
  8. What is the largest number that divides both 12 and 18 evenly?
  9. Find the greatest common factor of 36 and 20.
  10. Find the greatest common factor of 14 and 28.
  11. Find the greatest common factor of 3 and 6.
  12. What is the largest number that divides both 30 and 10 evenly?
  13. What is the largest number that divides both 22 and 11 evenly?
  14. What is the largest number that divides both 72 and 9 evenly?
  15. Find the greatest common factor of 46 and 69.
  16. Find the greatest common factor of 40 and 30.
  17. What is the GCF of 45 and 66?
  18. What is the GCF of 81 and 27?
  19. What is the largest number that divides both 75 and 50 evenly?
  20. What is the largest number that divides both 18 and 63 evenly?
More free practice: fieldbooklearning.com/uk/practice/year-7/greatest-common-factor-of-two-numbers-to-100/

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Answer key: Greatest common factor of two numbers to 100

  1. 2
  2. 4
  3. 4
  4. 2
  5. 4
  6. 3
  7. 2
  8. 6
  9. 4
  10. 14
  11. 3
  12. 10
  13. 11
  14. 9
  15. 23
  16. 10
  17. 3
  18. 27
  19. 25
  20. 9