1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 406 · 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. 1.891 + 198 =
2. 2.693 + 396 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
4. 4.594 + 495 =
5. 5.Take 842. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.495 + 594 =
7. 7.396 + 693 =
8. 8.297 + 792 =
9. 9.Take 891. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 440: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
12. 12.Do the 1089 trick with 774: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 961: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
16. 16.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 874. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 811. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 340. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 861: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 366. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 940. 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 5. What is that number?
24. 24.Take 429. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.198 + 891 =
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
27. 27.Take 187. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 209. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
30. 30.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 711. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 871. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 800: 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 4. What is that number?
35. 35.Take 389. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 801. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 984: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 965: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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