Math 7 · Unit 12: Ratio and proportion · Cambridge Lower Secondary Maths Stage 7

Questions

1. 1. Look at this diagram. Write the number of black squares.

   • 1
   • 2
   • 3
   • 0
   Check

2. 2. Look at this diagram. Write the number of white squares.

   • 2
   • 1
   • 4
   • 3
   Check

3. 3. Look at this diagram. Write the ratio of black squares : white squares.

   • 1 : 2
   • 1 : 3
   • 2 : 1
   • 3 : 1
   Check

4. 4. Look at this diagram. Write the ratio of white squares : black squares.

   • 1 : 2
   • 2 : 3
   • 2 : 1
   • 3 : 2
   Check

5. 5. Find the ratio of black squares : white squares in this diagram. It is 2 : □, which simplifies to 1 : □.

   • 2 : 8, which simplifies to 1 : 4
   • 2 : 8, which simplifies to 2 : 4
   • 2 : 10, which simplifies to 1 : 5
   • 2 : 8, which simplifies to 1 : 3
   Check

6. 6. Find the ratio of black squares : white squares in this diagram. It is 2 : □, which simplifies to 1 : □.

   • 2 : 8, which simplifies to 1 : 4
   • 2 : 12, which simplifies to 1 : 6
   • 2 : 10, which simplifies to 1 : 5
   • 2 : 10, which simplifies to 1 : 4
   Check

7. 7. Find the ratio of black squares : white squares in this diagram. It is □ : □, which simplifies to 2 : □.

   • 6 : 8, which simplifies to 2 : 3
   • 6 : 9, which simplifies to 2 : 4
   • 6 : 9, which simplifies to 2 : 3
   • 6 : 15, which simplifies to 2 : 5
   Check

8. 8. Write the ratio of white beads to black beads in this necklace, in its simplest form.

   • 1 : 2
   • 1 : 3
   • 2 : 4
   • 2 : 1
   Check

9. 9. Write the ratio of white beads to black beads in this necklace, in its simplest form.

   • 1 : 3
   • 3 : 1
   • 1 : 4
   • 2 : 6
   Check

10. 10. Write the ratio of white beads to black beads in this necklace, in its simplest form.

    • 3 : 5
    • 3 : 2
    • 6 : 4
    • 2 : 3
    Check

11. 11. Write the ratio of white beads to black beads in this necklace, in its simplest form.

    • 2 : 1
    • 1 : 1
    • 1 : 2
    • 4 : 4
    Check

12. 12. 2 : 8 written in its simplest form is: A 1 : 6, B 1 : 4 or C 1 : 2?

    • 1 : 4
    • 1 : 6
    • 1 : 2
    Check

13. 13. 5 : 15 written in its simplest form is: A 1 : 10, B 1 : 5 or C 1 : 3?

    • 1 : 5
    • 1 : 10
    • 1 : 3
    Check

14. 14. 24 : 4 written in its simplest form is: A 12 : 2, B 1 : 6 or C 6 : 1?

    • 1 : 6
    • 6 : 1
    • 12 : 2
    Check

15. 15. 18 : 9 written in its simplest form is: A 2 : 1, B 9 : 1 or C 1 : 2?

    • 2 : 1
    • 1 : 2
    • 9 : 1
    Check

16. 16. Write 2 : 4 in its simplest form.

    • 1 : 4
    • 2 : 2
    • 1 : 2
    • 2 : 1
    Check

17. 17. Write 2 : 20 in its simplest form.

    • 1 : 20
    • 2 : 10
    • 1 : 10
    • 10 : 1
    Check

18. 18. Write 3 : 9 in its simplest form.

    • 1 : 9
    • 1 : 6
    • 3 : 1
    • 1 : 3
    Check

19. 19. Write 3 km : 21 km in its simplest form.

    • 1 : 21
    • 3 : 7
    • 7 : 1
    • 1 : 7
    Check

20. 20. Write 4 L : 16 L in its simplest form.

    • 4 : 1
    • 2 : 8
    • 1 : 12
    • 1 : 4
    Check