1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 686 · 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.Do the 1089 trick with 408: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 551. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 133: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 246. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 570. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 258: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.693 + 396 =
9. 9.495 + 594 =
10. 10.297 + 792 =
11. 11.Take 902. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 831: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 750: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 300. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 116. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 924: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 824: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.594 + 495 =
20. 20.Take 896. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.792 + 297 =
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
23. 23.Do the 1089 trick with 135: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 138: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
26. 26.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 168: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
31. 31.891 + 198 =
32. 32.Take 155. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 658. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 745. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 590. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 127. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 256: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 742: reverse and subtract, then reverse that answer and add. What do you get?

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