1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 463 · 40 questions

The trick (Reverse and subtract): Reverse the number and take the smaller number away from the bigger one. The answer is always one of 198, 297, 396, 495, 594, 693, 792, 891: middle digit 9, first and last digits adding to 9. Reverse that answer and add: you always get 1089.

1. 1.Take 913. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 700: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 823. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 159. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 881: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 832. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 643: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.198 + 891 =
10. 10.Do the 1089 trick with 951: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 498: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
14. 14.Do the 1089 trick with 931: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.396 + 693 =
16. 16.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
19. 19.Take 643. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.891 + 198 =
21. 21.Take 179. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.495 + 594 =
23. 23.Do the 1089 trick with 740: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 285: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 164. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
28. 28.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 409: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
31. 31.Do the 1089 trick with 640: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.693 + 396 =
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
35. 35.Take 570. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 590. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 673. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 275. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 482: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 923. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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