1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 414 · 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 5. What is that number?
2. 2.Take 800. 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 1. What is that number?
4. 4.Do the 1089 trick with 480: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 449. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 773: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.396 + 693 =
8. 8.198 + 891 =
9. 9.Take 866. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
12. 12.Take 517. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
14. 14.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 410: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 199. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 490. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 188: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.495 + 594 =
20. 20.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
25. 25.Take 209. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 631. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 793. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 195. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 469: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
32. 32.Take 210. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 741: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.297 + 792 =
36. 36.Take 725. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 852. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 761. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?

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