1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 531 · 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.Take 206. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 910. 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 6. What is that number?
4. 4.Do the 1089 trick with 460: 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 8. What is that number?
6. 6.891 + 198 =
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
8. 8.Do the 1089 trick with 439: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 529. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.396 + 693 =
12. 12.495 + 594 =
13. 13.Do the 1089 trick with 441: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 674. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 580. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
17. 17.Take 165. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.297 + 792 =
19. 19.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 108. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.198 + 891 =
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
23. 23.Take 921. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 743. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 579. 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 2. What is that number?
29. 29.Do the 1089 trick with 905: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 458. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 623: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.792 + 297 =
34. 34.Do the 1089 trick with 319: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 440: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 470: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 885. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
39. 39.Take 436. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 185. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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