Math 7 · Unit 1: Integers · Cambridge Lower Secondary Maths Stage 7

Questions

1. 1. Worked example: find the factors of 24.

   • 1, 2, 3, 4, 6, 8, 12, 24
   • 24, 48, 72, 96
   • 2, 3, 4, 6, 8, 12
   • 1, 2, 3, 4, 6, 8, 12, 16, 24
   Check

2. 2. Worked example: find the highest common factor (HCF) of 24 and 80.

   • 240
   • 12
   • 4
   • 8
   Check

3. 3. Find the factors of: 21

   • 3, 7, 21
   • 1, 7, 21
   • 1, 3, 7, 21
   • 1, 3, 7
   Check

4. 4. Find the factors of: 32

   • 2, 4, 8, 16, 32
   • 1, 2, 4, 6, 8, 16, 32
   • 1, 2, 4, 8, 16, 32
   • 1, 2, 4, 8, 16
   Check

5. 5. Find the factors of: 50

   • 1, 2, 5, 10, 20, 25, 50
   • 1, 2, 5, 10, 25, 50
   • 1, 2, 5, 10, 25
   • 1, 2, 4, 5, 10, 25, 50
   Check

6. 6. Question 1d: find the factors of 72.

   • 2, 3, 4, 6, 8, 9, 12, 18, 24, 36
   • 1, 2, 4, 8, 9, 18, 36, 72
   • 1, 2, 3, 4, 6, 8, 12, 18, 24, 36, 72
   • 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, 72
   Check

7. 7. Find the factors of: 43

   • 1, 43
   • 43
   • 1, 2, 43
   • 1, 3, 43
   Check

8. 8. Find the factors of: 51

   • 1, 3, 9, 17, 51
   • 1, 3, 51
   • 1, 3, 17, 51
   • 1, 17, 51
   Check

9. 9. Find the factors of: 52

   • 1, 2, 4, 13, 26, 52
   • 1, 2, 4, 13, 52
   • 1, 2, 13, 26, 52
   • 1, 2, 4, 6, 13, 26, 52
   Check

10. 10. Find the factors of: 53

    • 53
    • 1, 53
    • 1, 3, 53
    • 1, 2, 53
    Check

11. 11. Question 2d: find the factors of 54.

    • 1, 2, 3, 6, 9, 18, 27, 54
    • 1, 2, 3, 6, 9, 27, 54
    • 2, 3, 6, 9, 18, 27
    • 1, 2, 3, 4, 6, 9, 18, 27, 54
    Check

12. 12. Find the factors of: 55

    • 1, 5, 10, 11, 55
    • 1, 5, 11
    • 1, 5, 55
    • 1, 5, 11, 55
    Check

13. 13. Question 3a: find the common factors of 16 and 28.

    • 1, 2, 4, 8
    • 2, 4
    • 1, 2, 4
    • 1, 2, 4, 7
    Check

14. 14. Question 3b: find the highest common factor of 16 and 28.

    • 8
    • 2
    • 4
    • 112
    Check

15. 15. Question 4a: find the common factors of 30 and 45.

    • 3, 5, 15
    • 1, 3, 5, 15
    • 1, 3, 5, 9, 15
    • 1, 3, 5, 6, 15
    Check

16. 16. Question 4b: find the highest common factor of 30 and 45.

    • 5
    • 3
    • 15
    • 90
    Check

17. 17. Find the highest common factor of: 18 and 21

    • 3
    • 9
    • 1
    • 6
    Check

18. 18. Find the highest common factor of: 18 and 27

    • 9
    • 18
    • 3
    • 27
    Check

19. 19. Find the highest common factor of: 18 and 36

    • 18
    • 36
    • 9
    • 6
    Check

20. 20. Find the highest common factor of: 27 and 45

    • 27
    • 3
    • 5
    • 9
    Check