1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 807 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
3. 3.Do the 1089 trick with 804: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.495 + 594 =
5. 5.198 + 891 =
6. 6.396 + 693 =
7. 7.Take 709. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.792 + 297 =
9. 9.Do the 1089 trick with 369: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.891 + 198 =
11. 11.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
14. 14.Do the 1089 trick with 821: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 406. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 579: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.693 + 396 =
18. 18.Do the 1089 trick with 340: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 587. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 724: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
23. 23.Do the 1089 trick with 210: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
25. 25.Do the 1089 trick with 135: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 811. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
28. 28.Take 629. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 520. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 882. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 154. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 229: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 230: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 430. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
37. 37.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 200. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.297 + 792 =

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