1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 645 · 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 330. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
3. 3.Do the 1089 trick with 885: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 705. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 470. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 458. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 810. 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 3. What is that number?
10. 10.Take 257. 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 6. What is that number?
12. 12.Take 781. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.693 + 396 =
14. 14.Do the 1089 trick with 370: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 733. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 480: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 379. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 430: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 914. 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 5. What is that number?
22. 22.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.198 + 891 =
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
25. 25.Do the 1089 trick with 139: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.594 + 495 =
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
29. 29.792 + 297 =
30. 30.Take 590. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 601. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 245. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 350: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 670: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 692. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 104: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.495 + 594 =
40. 40.Take 805. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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