1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 5 · 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 582. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 461: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 258: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 208: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 521. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 351: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 195. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 987: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
12. 12.Do the 1089 trick with 742: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 947. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 431. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 781: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 791. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 421. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.594 + 495 =
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
21. 21.Do the 1089 trick with 104: reverse and subtract, then reverse that answer and add. 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.Take 229. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 901: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 992. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
27. 27.Do the 1089 trick with 215: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 774: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 320: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 592. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.792 + 297 =
32. 32.Do the 1089 trick with 753: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 158: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
35. 35.Do the 1089 trick with 624: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.693 + 396 =
37. 37.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 428. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 451: reverse and subtract, then reverse that answer and add. What do you get?

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