1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 785 · 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 4. What is that number?
2. 2.Take 430. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
6. 6.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 671: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
9. 9.198 + 891 =
10. 10.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 702: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 278: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.495 + 594 =
14. 14.Take 490. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 246: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 640. 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 1. What is that number?
18. 18.Take 220. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.297 + 792 =
20. 20.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.792 + 297 =
22. 22.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
24. 24.Do the 1089 trick with 258: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 673: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
27. 27.594 + 495 =
28. 28.Take 136. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.396 + 693 =
31. 31.Do the 1089 trick with 400: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 437: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 432: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 309. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 168. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.891 + 198 =
37. 37.Take 139. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 299. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 863. 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 8. What is that number?

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