1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 866 · 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 280. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
3. 3.Take 834. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.594 + 495 =
5. 5.396 + 693 =
6. 6.792 + 297 =
7. 7.Do the 1089 trick with 421: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
10. 10.495 + 594 =
11. 11.Do the 1089 trick with 369: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 911. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 619. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 831. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 165. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.297 + 792 =
17. 17.Do the 1089 trick with 409: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 550. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 104: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
21. 21.Do the 1089 trick with 400: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 935. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 719. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.198 + 891 =
25. 25.Do the 1089 trick with 460: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 699. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 229: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 771: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 611. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 185. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 244. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 760: 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 5. What is that number?
35. 35.Take 406. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 295. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 610: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 895. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?

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