| | | | | | | | | | | | | |

| | | 6 | 3 | 3 | 4 | 18 | 24 | | | | | |

1 | 1. Work out the HCF for the following numbers 18 and 24 | | 2 | 2 | 3 | 2 | 4 | 4 | | | | | |

2 | 2. Work out the HCF for the following numbers 4 and 4 | | 6 | 6 | 4 | 5 | 36 | 30 | | | | | |

3 | 3. Work out the HCF for the following numbers 36 and 30 | | 3 | 2 | 6 | 2 | 6 | 6 | | | | | |

4 | 4. Work out the HCF for the following numbers 6 and 6 | | 3 | 2 | 6 | 5 | 6 | 15 | | | | | |

5 | 5. Work out the HCF for the following numbers 6 and 15 | | 6 | 4 | 4 | 2 | 24 | 12 | | | | | |

6 | 6. Work out the HCF for the following numbers 24 and 12 | | 3 | 3 | 3 | 3 | 9 | 9 | | | | | |

7 | 7. Work out the HCF for the following numbers 9 and 9 | | 3 | 2 | 3 | 2 | 6 | 6 | | | | | |

8 | 8. Work out the HCF for the following numbers 6 and 6 | | 2 | 4 | 3 | 6 | 8 | 12 | | | | | |

9 | 9. Work out the HCF for the following numbers 8 and 12 | | 2 | 6 | 2 | 2 | 12 | 4 | | | | | |

10 | 10. Work out the HCF for the following numbers 12 and 4 | | 6 | 2 | 2 | 4 | 12 | 24 | | | | | |

11 | 11. Work out the HCF for the following numbers 12 and 24 | | 4 | 4 | 2 | 5 | 16 | 20 | | | | | |

12 | 12. Work out the HCF for the following numbers 16 and 20 | | 3 | 5 | 2 | 2 | 15 | 6 | | | | | |

13 | 13. Work out the HCF for the following numbers 15 and 6 | | 4 | 4 | 4 | 4 | 16 | 16 | | | | | |

14 | 14. Work out the HCF for the following numbers 16 and 16 | | 2 | 5 | 3 | 3 | 10 | 6 | | | | | |

15 | 15. Work out the HCF for the following numbers 10 and 6 | | 6 | 4 | 4 | 5 | 24 | 30 | | | | | |

16 | 16. Work out the HCF for the following numbers 24 and 30 | | 2 | 3 | 6 | 2 | 6 | 4 | | | | | |

17 | 17. Work out the HCF for the following numbers 6 and 4 | | 5 | 3 | 3 | 2 | 15 | 10 | | | | | |

18 | 18. Work out the HCF for the following numbers 15 and 10 | | 5 | 2 | 3 | 3 | 10 | 15 | | | | | |

19 | 19. Work out the HCF for the following numbers 10 and 15 | | 5 | 6 | 5 | 3 | 30 | 15 | | | | | |

20 | 20. Work out the HCF for the following numbers 30 and 15 | | 2 | 4 | 3 | 4 | 8 | 8 | | | | | |

21 | 21. Work out the HCF for the following numbers 8 and 8 | | 5 | 6 | 5 | 5 | 30 | 25 | | | | | |

22 | 22. Work out the HCF for the following numbers 30 and 25 | | 4 | 5 | 2 | 4 | 20 | 16 | | | | | |

23 | 23. Work out the HCF for the following numbers 20 and 16 | | 3 | 2 | 6 | 5 | 6 | 15 | | | | | |

24 | 24. Work out the HCF for the following numbers 6 and 15 | | 4 | 2 | 3 | 4 | 8 | 16 | | | | | |

25 | 25. Work out the HCF for the following numbers 8 and 16 | | 3 | 3 | 4 | #NEED_UPDATE | 9 | #NEED_UPDATE | | | | | |

26 | #NEED_UPDATE | | 6 | 6 | 3 | -1 | 36 | -6 | | | | | |

| | | | | | | | | | | | | |

| Answers: | | | | | | | | | | | | |

| 1. 6 | | | | | | | | | | | | |

| 2. 4 | | | | | | | | | | | | |

| 3. 6 | | | | | | | | | | | | |

| 4. 6 | | | | | | | | | | | | |

| 5. 3 | | | | | | | | | | | | |

| 6. 12 | | | | | | | | | | | | |

| 7. 9 | | | | | | | | | | | | |

| 8. 6 | | | | | | | | | | | | |

| 9. 4 | | | | | | | | | | | | |

| 10. 4 | | | | | | | | | | | | |

| 11. 12 | | | | | | | | | | | | |

| 12. 4 | | | | | | | | | | | | |

| 13. 3 | | | | | | | | | | | | |

| 14. 16 | | | | | | | | | | | | |

| 15. 2 | | | | | | | | | | | | |

| 16. 6 | | | | | | | | | | | | |

| 17. 2 | | | | | | | | | | | | |

| 18. 5 | | | | | | | | | | | | |

| 19. 5 | | | | | | | | | | | | |

| 20. 15 | | | | | | | | | | | | |

| 21. 8 | | | | | | | | | | | | |

| 22. 5 | | | | | | | | | | | | |

| 23. 4 | | | | | | | | | | | | |

| 24. 3 | | | | | | | | | | | | |

| 25. 8 | | | | | | | | | | | | |

| #NEED_UPDATE | | | | | | | | | | | | |

| | | | | | | | | | | | | |