1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 747 · 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 4. What is that number?
2. 2.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
4. 4.Take 781. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.495 + 594 =
6. 6.Do the 1089 trick with 913: 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 3. What is that number?
8. 8.Do the 1089 trick with 845: reverse and subtract, then reverse that answer and add. 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
11. 11.297 + 792 =
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
13. 13.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.198 + 891 =
16. 16.Take 751. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 510: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 941. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 371. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.792 + 297 =
21. 21.396 + 693 =
22. 22.Do the 1089 trick with 611: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 679. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 159: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 139. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 115. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 501. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.891 + 198 =
31. 31.Take 388. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 123: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 194. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 327: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 366: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
37. 37.Take 634. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 487. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 440: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 650: reverse and subtract, then reverse that answer and add. What do you get?

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