1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 704 · 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 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 103: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
4. 4.396 + 693 =
5. 5.792 + 297 =
6. 6.Do the 1089 trick with 438: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 229: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 452: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
12. 12.Take 701. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
14. 14.Take 486. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 185. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 169: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 468: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
21. 21.Do the 1089 trick with 823: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 612: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 217. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
25. 25.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 692: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 237. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.297 + 792 =
32. 32.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 843. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
35. 35.Do the 1089 trick with 159: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.693 + 396 =
37. 37.Take 774. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 280. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 513. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?

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