1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 496 · 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 811. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 540: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
4. 4.Do the 1089 trick with 135: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
6. 6.Do the 1089 trick with 734: 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.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.198 + 891 =
10. 10.Take 397. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 806. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.693 + 396 =
13. 13.Do the 1089 trick with 693: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 432. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 714: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 209. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 720: 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 3. What is that number?
19. 19.Do the 1089 trick with 913: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 147. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 116. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 963. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.594 + 495 =
25. 25.Take 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.297 + 792 =
27. 27.Do the 1089 trick with 220: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 350: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
30. 30.396 + 693 =
31. 31.Take 654. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.792 + 297 =
33. 33.Take 816. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
36. 36.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 195. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 164. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 305: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 784. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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