1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 749 · 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 2. What is that number?
2. 2.Do the 1089 trick with 981: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 800: 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 7. What is that number?
6. 6.Take 432. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.495 + 594 =
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
9. 9.693 + 396 =
10. 10.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 338: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 247. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 507. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 578. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 326. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 732: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.891 + 198 =
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 350: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 510: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 339: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
27. 27.Do the 1089 trick with 913: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 873: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 733. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 580. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 770: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 831: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 844: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.297 + 792 =
35. 35.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.198 + 891 =
37. 37.Do the 1089 trick with 488: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 974: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 769. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 229. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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