1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 865 · 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 8. What is that number?
2. 2.Take 654. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
4. 4.Do the 1089 trick with 886: 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 3. What is that number?
6. 6.Do the 1089 trick with 652: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 799. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 816: 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 7. What is that number?
11. 11.396 + 693 =
12. 12.693 + 396 =
13. 13.Do the 1089 trick with 961: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.594 + 495 =
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
16. 16.Do the 1089 trick with 167: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 482. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.198 + 891 =
19. 19.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 260. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 772. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 802. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 179. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 663: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.891 + 198 =
28. 28.Do the 1089 trick with 297: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 745. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
31. 31.Take 440. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 689. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 690: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.792 + 297 =
35. 35.Do the 1089 trick with 651: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.495 + 594 =
37. 37.Take 104. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 821: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.297 + 792 =
40. 40.Take 582. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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