1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 369 · 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 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 763. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 926: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
6. 6.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 713. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.198 + 891 =
10. 10.Do the 1089 trick with 991: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.297 + 792 =
12. 12.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 811. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 841: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
16. 16.Take 560. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.495 + 594 =
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
19. 19.Take 409. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 108. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 983. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 325. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.594 + 495 =
24. 24.Take 177. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.792 + 297 =
26. 26.Take 165. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 724: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 441. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
31. 31.693 + 396 =
32. 32.396 + 693 =
33. 33.Do the 1089 trick with 842: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 186. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 901. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 730: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 698: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 714. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?

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