1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 750 · 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 1. What is that number?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
3. 3.Do the 1089 trick with 621: 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 7. What is that number?
5. 5.693 + 396 =
6. 6.Take 703. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.792 + 297 =
9. 9.Take 360. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 496: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 178. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.297 + 792 =
13. 13.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 956. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.396 + 693 =
17. 17.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 512: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
20. 20.Take 905. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
22. 22.Take 976. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.594 + 495 =
24. 24.Take 914. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 742. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 299. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 274. 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 614: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 308. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 601. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 892. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 200. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.891 + 198 =
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
36. 36.Do the 1089 trick with 542: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 709. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.198 + 891 =
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
40. 40.Do the 1089 trick with 490: reverse and subtract, then reverse that answer and add. What do you get?

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