1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 817 · 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 2. What is that number?
2. 2.Do the 1089 trick with 590: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 618: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 800: 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 6. What is that number?
6. 6.297 + 792 =
7. 7.Do the 1089 trick with 436: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 930. Reverse its digits and take the smaller number away from the bigger one. 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
11. 11.Do the 1089 trick with 851: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
14. 14.Take 239. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.891 + 198 =
17. 17.198 + 891 =
18. 18.Take 752. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
20. 20.Do the 1089 trick with 964: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 542: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
23. 23.Do the 1089 trick with 975: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 522. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 200. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 502: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 824. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 197. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 529: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 460: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.594 + 495 =
34. 34.Do the 1089 trick with 714: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.792 + 297 =
38. 38.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 527: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.693 + 396 =

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