1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 304 · 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 8. What is that number?
2. 2.495 + 594 =
3. 3.Take 108. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 830: 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 5. What is that number?
6. 6.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 865: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 169. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.594 + 495 =
10. 10.Take 805. Reverse its digits and take the smaller number away from the bigger one. What do you get?
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.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.396 + 693 =
15. 15.Do the 1089 trick with 801: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 934. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.198 + 891 =
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
19. 19.Do the 1089 trick with 630: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
21. 21.Take 128. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.792 + 297 =
23. 23.Take 219. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 530. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
26. 26.Take 335. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 127: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
29. 29.Do the 1089 trick with 179: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.693 + 396 =
31. 31.Do the 1089 trick with 609: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 785. 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 7. What is that number?
35. 35.891 + 198 =
36. 36.Take 563. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 740: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 772. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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