1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 198 · 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 926. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.693 + 396 =
3. 3.Do the 1089 trick with 547: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
5. 5.Take 300. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.792 + 297 =
7. 7.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 713. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.396 + 693 =
12. 12.Take 185. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 420: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 961. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 503: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 821: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
18. 18.Take 143. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 109. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.594 + 495 =
21. 21.Take 528. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 492. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.891 + 198 =
24. 24.Take 937. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 173. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 920: 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 1. What is that number?
28. 28.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 921. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.495 + 594 =
32. 32.Do the 1089 trick with 309: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 701. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 650. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 379. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 891: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 611: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 912: reverse and subtract, then reverse that answer and add. What do you get?

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