1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 748 · 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.Do the 1089 trick with 410: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
4. 4.Do the 1089 trick with 196: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 350. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.396 + 693 =
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
8. 8.297 + 792 =
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
10. 10.891 + 198 =
11. 11.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
14. 14.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 466: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 388. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 993. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.198 + 891 =
22. 22.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.495 + 594 =
25. 25.Take 914. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 741. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 422. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
29. 29.Do the 1089 trick with 158: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.693 + 396 =
32. 32.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 674. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 629. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 861. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 826: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
38. 38.Do the 1089 trick with 238: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 771: reverse and subtract, then reverse that answer and add. What do you get?

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