1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 621 · 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 105. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
3. 3.198 + 891 =
4. 4.Do the 1089 trick with 642: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 377. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 961: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.693 + 396 =
8. 8.Do the 1089 trick with 458: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.594 + 495 =
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
11. 11.Do the 1089 trick with 509: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.891 + 198 =
13. 13.Take 871. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
16. 16.Take 572. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 533. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 986. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
20. 20.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.297 + 792 =
22. 22.396 + 693 =
23. 23.792 + 297 =
24. 24.Do the 1089 trick with 116: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
26. 26.Do the 1089 trick with 517: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.495 + 594 =
28. 28.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 660: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. 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 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 713. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 941. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 933. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 492. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 670: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 422: reverse and subtract, then reverse that answer and add. What do you get?

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