1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 564 · 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 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 173. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.297 + 792 =
5. 5.594 + 495 =
6. 6.396 + 693 =
7. 7.693 + 396 =
8. 8.495 + 594 =
9. 9.Take 604. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
12. 12.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 822: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
15. 15.Do the 1089 trick with 107: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 704: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 530: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 523. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 981. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.792 + 297 =
23. 23.Do the 1089 trick with 198: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.198 + 891 =
25. 25.Do the 1089 trick with 881: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 907. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 178. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 438. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 552. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 173: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 397: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 834. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 116. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
38. 38.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 561. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 248. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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