1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 99 · 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 5. What is that number?
2. 2.891 + 198 =
3. 3.Do the 1089 trick with 660: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 175. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 640: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 996: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 138: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 931. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 510: 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 4. What is that number?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
14. 14.198 + 891 =
15. 15.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.297 + 792 =
17. 17.594 + 495 =
18. 18.495 + 594 =
19. 19.Take 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 651: 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 6. What is that number?
22. 22.Do the 1089 trick with 137: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 806. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 527. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
26. 26.Do the 1089 trick with 422: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
28. 28.Take 249. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
30. 30.Do the 1089 trick with 905: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 814. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 119: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 642. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 307: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 300. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 452: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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