1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 512 · 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 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 338. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.297 + 792 =
4. 4.Take 954. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.693 + 396 =
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
9. 9.Take 167. 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.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 719: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 109: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 379. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.198 + 891 =
16. 16.Do the 1089 trick with 984: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
20. 20.Do the 1089 trick with 380: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
22. 22.Take 521. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.891 + 198 =
24. 24.Do the 1089 trick with 795: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.792 + 297 =
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
28. 28.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 217. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 903: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 370: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.594 + 495 =
34. 34.Do the 1089 trick with 200: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 148. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 340. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 246. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 580. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 993. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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