1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 61 · 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 5. What is that number?
2. 2.Take 678. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 401: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.297 + 792 =
5. 5.Take 127. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
7. 7.198 + 891 =
8. 8.Take 450. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
10. 10.Do the 1089 trick with 590: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.396 + 693 =
12. 12.Do the 1089 trick with 976: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
14. 14.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
16. 16.Do the 1089 trick with 991: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 984: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 510. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 903. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 103. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 496: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 623. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
25. 25.Do the 1089 trick with 249: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.594 + 495 =
27. 27.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 306: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 621. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 588: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 937. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 589. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 831: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.693 + 396 =
38. 38.Take 813. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 977. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 285: reverse and subtract, then reverse that answer and add. What do you get?

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