1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 313 · 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 4. What is that number?
2. 2.495 + 594 =
3. 3.Do the 1089 trick with 166: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.198 + 891 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
6. 6.Do the 1089 trick with 552: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 460: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.396 + 693 =
10. 10.Do the 1089 trick with 420: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 390: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 984: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.693 + 396 =
14. 14.792 + 297 =
15. 15.891 + 198 =
16. 16.594 + 495 =
17. 17.Take 349. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 775. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 270: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 123: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.297 + 792 =
23. 23.Do the 1089 trick with 265: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 188: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 358: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 723. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
28. 28.Take 542. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 984. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 901. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
33. 33.Do the 1089 trick with 538: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 361. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 402: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 154. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 608: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 225: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?

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