1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 647 · 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.Do the 1089 trick with 366: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
3. 3.Do the 1089 trick with 390: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 765: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 388: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 340. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 319: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
10. 10.Do the 1089 trick with 992: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 326: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.297 + 792 =
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
14. 14.594 + 495 =
15. 15.Do the 1089 trick with 612: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 137: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.891 + 198 =
18. 18.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.396 + 693 =
21. 21.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.198 + 891 =
23. 23.693 + 396 =
24. 24.Take 195. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 900. 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 6. What is that number?
27. 27.Take 782. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
29. 29.Do the 1089 trick with 602: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 208: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 872: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 862. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 799. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 967: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.792 + 297 =
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
37. 37.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 153. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.495 + 594 =
40. 40.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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