1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 693 · 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 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.396 + 693 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
4. 4.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.594 + 495 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
7. 7.Do the 1089 trick with 521: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 300: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.792 + 297 =
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
11. 11.Take 713. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.198 + 891 =
13. 13.297 + 792 =
14. 14.Do the 1089 trick with 835: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
17. 17.Take 781. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 521. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.495 + 594 =
20. 20.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 523. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 481. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 420. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 573: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.891 + 198 =
27. 27.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
29. 29.Take 194. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 911: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 733: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
34. 34.Take 559. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 983. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 230. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 188. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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