1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 475 · 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.Do the 1089 trick with 320: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 661: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 892. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 770: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 136. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 664. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.594 + 495 =
10. 10.Take 951. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
12. 12.396 + 693 =
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
15. 15.Do the 1089 trick with 784: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
17. 17.Take 216. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.297 + 792 =
20. 20.Take 166. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
22. 22.792 + 297 =
23. 23.Take 985. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 572. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 104: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 813. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 406. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 365. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 842. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 149. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 218: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 220: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 165: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 862. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 521: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 512. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.495 + 594 =
39. 39.693 + 396 =
40. 40.Take 551. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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