1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 312 · 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.Take 557. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 250. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
7. 7.Take 925. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.891 + 198 =
10. 10.495 + 594 =
11. 11.Do the 1089 trick with 783: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 239: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 528. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.792 + 297 =
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
16. 16.Do the 1089 trick with 540: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.594 + 495 =
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
20. 20.Take 163. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.396 + 693 =
22. 22.297 + 792 =
23. 23.Do the 1089 trick with 967: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 329: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 873: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 125: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 613. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.693 + 396 =
30. 30.Do the 1089 trick with 662: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 917: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 381. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 341. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 582. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 490. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 298: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 751. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 411. 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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