1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 863 · 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.Take 950. 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 3. What is that number?
4. 4.Take 184. Reverse its digits and take the smaller number away from the bigger one. 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 388. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
8. 8.Do the 1089 trick with 719: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 542. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 650. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 229. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 915: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 573: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 664. 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 4. What is that number?
17. 17.297 + 792 =
18. 18.792 + 297 =
19. 19.Take 795. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 428. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 824: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.198 + 891 =
24. 24.Do the 1089 trick with 881: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 700: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.594 + 495 =
27. 27.Do the 1089 trick with 109: 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 7. What is that number?
29. 29.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 219. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 146: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 541. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 604: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 831. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
38. 38.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 371: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.396 + 693 =

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