1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 70 · 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 2. What is that number?
2. 2.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 680. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
5. 5.Take 215. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 472: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.594 + 495 =
9. 9.Take 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 410: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 216. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 529. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 381. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.297 + 792 =
20. 20.Take 139. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.792 + 297 =
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
23. 23.Do the 1089 trick with 401: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 210. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.396 + 693 =
26. 26.Do the 1089 trick with 294: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.693 + 396 =
28. 28.Do the 1089 trick with 782: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 168. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 912. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
32. 32.Take 521. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
34. 34.Do the 1089 trick with 169: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 791: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
37. 37.Take 833. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 550: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
40. 40.Take 842. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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