1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 904 · 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 3. What is that number?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
4. 4.198 + 891 =
5. 5.Take 689. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 472: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
8. 8.792 + 297 =
9. 9.Take 934. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 952: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.594 + 495 =
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
13. 13.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 209. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
18. 18.Take 502. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 992: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 600: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 721. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 814. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
26. 26.297 + 792 =
27. 27.Do the 1089 trick with 701: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 964. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 174: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 923: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 220: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.693 + 396 =
33. 33.Take 406. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 512: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 401. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 235. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 491. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 449: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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