1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 499 · 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 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 587. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 974. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.297 + 792 =
5. 5.Take 510. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.198 + 891 =
7. 7.Take 629. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
10. 10.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.792 + 297 =
14. 14.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.693 + 396 =
16. 16.Take 824. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.891 + 198 =
18. 18.Do the 1089 trick with 986: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 751. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 497: 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 3. What is that number?
22. 22.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.495 + 594 =
24. 24.Take 769. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 230. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 984: 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 2. What is that number?
28. 28.Do the 1089 trick with 469: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.594 + 495 =
30. 30.Take 895. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
32. 32.Take 361. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 902: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 540. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 802: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 740: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 604. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 783: reverse and subtract, then reverse that answer and add. What do you get?

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