Math 4 · Unit 5: Multiplication, multiples and factors · Cambridge Primary Maths Stage 4

Questions

1. 1. Write the missing factors of 20, from smallest to largest. Factors of 20 = 1, ☐, ☐, ☐, ☐, 20

   Put these in order.

   • 4
   • 10
   • 5
   • 2
   Check

2. 2. On a hundred square you colour the multiples of 2 and the multiples of 5. What do you notice about the multiples of 10?

   • They are multiples of both 2 and 5, so they get both colours.
   • They are only multiples of 2.
   • They are not coloured.
   • They are only multiples of 5.
   Check

3. 3. Write the missing numbers in this multiplication grid.

   Fill the blanks with these.

   • 24
   • 12
   • 20
   • 16
   • 6
   • 4
   Check

4. 4. Complete this cross number puzzle. What are the answers to all the clues?

   • Across: 1 is 48, 2 is 81, 4 is 4, 5 is 9, 8 is 60, 9 is 14. Down: 1 is 48, 3 is 15, 6 is 36, 7 is 21.
   • Across: 1 is 48, 2 is 72, 4 is 3, 5 is 9, 8 is 60, 9 is 14. Down: 1 is 42, 3 is 18, 6 is 36, 7 is 24.
   • Across: 1 is 46, 2 is 81, 4 is 4, 5 is 9, 8 is 60, 9 is 14. Down: 1 is 42, 3 is 18, 6 is 36, 7 is 24.
   • Across: 1 is 48, 2 is 81, 4 is 4, 5 is 9, 8 is 60, 9 is 14. Down: 1 is 42, 3 is 18, 6 is 36, 7 is 24.
   Check

5. 5. Write all the factor pairs of 18. The factor pairs of 8 are shown as an example.

   Fill the blanks with these.

   • 9
   • 4
   • 6
   • 3
   • 18
   • 12
   Check

6. 6. Complete the factor bug for 36. The pairs of numbers on the legs multiply to make 36.

   Fill the blanks with these.

   • 6
   • 18
   • 12
   • 8
   • 2
   • 4
   • 3
   • 9
   • 24
   Check

7. 7. The number in each brick is the product of the two numbers below it. Write the missing numbers in these diagrams.

   Fill the blanks with these.

   • 48
   • 63
   • 35
   • 56
   • 7
   • 30
   • 36
   • 6
   • 15
   Check

8. 8. Which sign makes this true? 3 × 8 ☐ 5 × 5

   • +
   • >
   • <
   • =
   Check

9. 9. Which sign makes this true? 6 × 4 ☐ 4 × 6

   • =
   • <
   • +
   • >
   Check

10. 10. Which sign makes this true? 7 × 8 ☐ 6 × 9

    • >
    • =
    • −
    • <
    Check

11. 11. Which sign makes this true? 4 × 4 ☐ 2 × 8

    • =
    • >
    • ×
    • <
    Check

12. 12. Tick the 8 numbers that are not multiples of 7.

    Tick all the right answers.

    • ☐ 7
    • ☐ 17
    • ☐ 27
    • ☐ 37
    • ☐ 47
    • ☐ 57
    • ☐ 67
    • ☐ 77
    • ☐ 87
    • ☐ 97
    Check

13. 13. Which number on this grid is a multiple of 7?

    • 57
    • 38
    • 49
    • 47
    Check

14. 14. Hexagon maze: from Start, step to a multiple of 2 (2, 14, 18 or 10), then to a neighbouring outside hexagon that is a multiple of 5. Which path works?

    • Start → 2 → 1
    • Start → 14 → 3
    • Start → 18 → 20
    • Start → 10 → 16
    Check

15. 15. Tick the 6 numbers that are factors of 12.

    Tick all the right answers.

    • ☐ 1
    • ☐ 2
    • ☐ 3
    • ☐ 4
    • ☐ 6
    • ☐ 8
    • ☐ 12
    • ☐ 24
    • ☐ 36
    • ☐ 72
    Check

16. 16. Complete these multiplication triangles. The product of the two circles on each line is the number in the square.

    Fill the blanks with these.

    • 45
    • 4
    • 63
    • 14
    • 3
    • 12
    • 35
    • 36
    • 5
    Check

17. 17. In the first multiplication grid, the answers in the 2 column are 12, 6, 16 and 8. Write the missing row numbers.

    Fill the blanks with these.

    • 24
    • 6
    • 8
    • 3
    • 4
    • 10
    Check

18. 18. Use each digit card 2, 3, 4, 9 once to make ?? + ?? that is a multiple of 7. Which works?

    • 42 + 93
    • 43 + 29
    • 24 + 39
    • 23 + 49
    Check

19. 19. Cross out two numbers so that the sum of the remaining numbers in each row and column is a multiple of 5. Tick the 2 numbers to cross out.

    Tick all the right answers.

    • ☐ 1 in row 1
    • ☐ 8 in row 1
    • ☐ 5 in row 2
    • ☐ 6 in row 2
    • ☐ 3 in row 3
    • ☐ 9 in row 4
    Check

20. 20. Saira's two different numbers are both factors of 12, and their difference is 4. What are they?

    • 8 and 12
    • 4 and 8
    • 2 and 6
    • 1 and 5
    Check