Create a free account now and get 3 full lessons, completely free. Get my 3 free lessons

Australia
Practise online insteadThe answer key prints on page 2.

Greatest common factor of two numbers to 100

Year 6 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/au/practice/year-6/greatest-common-factor-of-two-numbers-to-100/

Play it as a quiz game

20 of these questions as multiple choice, with near-miss wrong answers, ready for Kahoot or Blooket.

  1. Download the game's own question template: in Kahoot, Add question → Import spreadsheet; in Blooket, Create a set → Spreadsheet import.
  2. Click the matching button below, then click the first empty question row of the template and paste.
  3. Save the template (Kahoot needs .xlsx, Blooket .csv) and upload it.
Download CSV

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