Math 4 · Unit 15: Special numbers · Cambridge Primary Maths Stage 4

Questions

1. 1. Worked example: use all the digits 8, 0, 9 and 5 to make the smallest 4-digit number that is divisible by both 2 and 5.

   • 9850
   • 8590
   • 5890
   • 5980
   Check

2. 2. Tick the 2 numbers that are divisible by 2.

   Tick all the right answers.

   • ☐ 232
   • ☐ 234
   • ☐ 243
   • ☐ 223
   • ☐ 251
   • ☐ 215
   Check

3. 3. Write these numbers in the Venn diagram. 302, 25, 203, 400, 205, 52, 502

   Fill the blanks with these.

   • 25
   • 400
   • 302
   • 253
   • 203
   • 340
   • 52
   • 205
   • 502
   Check

4. 4. Match each number to the rule for dividing by it.

   • Divisible by 2
   • Divisible by 5
   • Divisible by 10
   • Divisible by 100

   • ones digit is 0 or 5
   • ones digit is 0
   • tens and ones digits are 0
   • ones digit is 0, 2, 4, 6 or 8
   Check

5. 5. A number is divisible by ☐ if the ones digit is 0, 2, 4, 6 or 8. Use 2, 5, 10 or 100.

   • 5
   • 2
   • 100
   • 10
   Check

6. 6. A number is divisible by ☐ if the ones digit is 0. Use 2, 5, 10 or 100.

   • 5
   • 10
   • 2
   • 100
   Check

7. 7. Write these numbers in the table: 25, 500, 310, 1000, 105, 690

   Fill the blanks with these.

   • 55
   • 500
   • 310
   • 1000
   • 105
   • 690
   • 25
   • 700
   Check

8. 8. The numbers in the grid that are divisible by 2, 5 or 10 are coloured. A secret calculation appears. What is the answer to it?

   • 17
   • 72
   • 16
   • 89
   Check

9. 9. Alex says, 'The number fifteen thousand five hundred and fifty-three is divisible by 5.' Is he correct?

   • Yes
   • No
   Check

10. 10. Which of 250, 205, 502 and 520 is divisible by 5 but not by 2 or 10, and which two more numbers are too?

    • 520; two more: 25 and 502
    • 205; two more: 25 and 105
    • 205; two more: 250 and 105
    • 250; two more: 25 and 105
    Check

11. 11. Here is a set of numbers: 20, 50, 75, 300, 350, 600, 650, 675. Tick the 2 numbers that are divisible by 100.

    Tick all the right answers.

    • ☐ 20
    • ☐ 50
    • ☐ 75
    • ☐ 300
    • ☐ 350
    • ☐ 600
    • ☐ 650
    • ☐ 675
    Check

12. 12. Here is a set of numbers: 20, 50, 75, 300, 350, 600, 650, 675. Tick the 5 numbers that are divisible by 50.

    Tick all the right answers.

    • ☐ 20
    • ☐ 50
    • ☐ 75
    • ☐ 300
    • ☐ 350
    • ☐ 600
    • ☐ 650
    • ☐ 675
    Check

13. 13. Here is a set of numbers: 20, 50, 75, 300, 350, 600, 650, 675. Tick the 7 numbers that are divisible by 25.

    Tick all the right answers.

    • ☐ 20
    • ☐ 50
    • ☐ 75
    • ☐ 300
    • ☐ 350
    • ☐ 600
    • ☐ 650
    • ☐ 675
    Check

14. 14. What is the smallest number that can be added to 333 to make it divisible by 25?

    • 7
    • 67
    • 25
    • 17
    Check