1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 362 · 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 359: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 652. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.792 + 297 =
5. 5.891 + 198 =
6. 6.Take 139. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 277: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 875. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 319. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 871. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 470: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 389: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
14. 14.Do the 1089 trick with 270: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 590. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
17. 17.Take 125. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.495 + 594 =
19. 19.Do the 1089 trick with 402: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.594 + 495 =
21. 21.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
23. 23.Do the 1089 trick with 811: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 730: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 210: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.396 + 693 =
27. 27.Do the 1089 trick with 258: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 401. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
30. 30.Do the 1089 trick with 217: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 311. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
34. 34.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 418. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 805: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 770: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 523. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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