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		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

Highest Common Factor (Numbers Less Than 12)