1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 502 · 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 3. What is that number?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
3. 3.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 811: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 249: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 861. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 821: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 148. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.396 + 693 =
10. 10.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.297 + 792 =
12. 12.693 + 396 =
13. 13.Take 802. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 199: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 832. 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 7. What is that number?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
18. 18.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.198 + 891 =
20. 20.Take 882. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.594 + 495 =
22. 22.Take 951. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 801: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 136: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 691: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 844: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 448: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 770: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.495 + 594 =
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
32. 32.Take 420. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 694. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 901: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 205. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 629: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 523. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 602. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 863. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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