1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 622 · 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.Take 579. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 365: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.396 + 693 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
6. 6.Do the 1089 trick with 824: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 704. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 513: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 510: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.198 + 891 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
12. 12.Take 104. 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 590. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 811. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.594 + 495 =
17. 17.792 + 297 =
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
19. 19.Do the 1089 trick with 350: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
21. 21.Take 335. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 107. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 459: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 701: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 470: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 765: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.495 + 594 =
30. 30.Take 791. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
32. 32.Do the 1089 trick with 624: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.693 + 396 =
34. 34.297 + 792 =
35. 35.Take 872. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.891 + 198 =
37. 37.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 902. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 600: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?

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