1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 87 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
3. 3.Take 668. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.396 + 693 =
5. 5.495 + 594 =
6. 6.Do the 1089 trick with 633: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
8. 8.792 + 297 =
9. 9.Take 349. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.198 + 891 =
11. 11.Do the 1089 trick with 643: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
13. 13.Take 916. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.891 + 198 =
15. 15.Take 651. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 518: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 603: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
19. 19.693 + 396 =
20. 20.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 123. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
23. 23.Take 863. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 456. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 650. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 620: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 129: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 118: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
33. 33.Take 269. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 417. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 542: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 338: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.297 + 792 =
38. 38.594 + 495 =
39. 39.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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