1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 495 · 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 178. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 964. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.198 + 891 =
4. 4.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 812: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
7. 7.Do the 1089 trick with 137: 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 7. What is that number?
9. 9.Take 704. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 135: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 610: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.891 + 198 =
13. 13.792 + 297 =
14. 14.Do the 1089 trick with 740: 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 1. What is that number?
16. 16.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 801. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 772. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 694: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 157: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 521: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.594 + 495 =
25. 25.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 512. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 145. 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.Do the 1089 trick with 230: 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 4. What is that number?
32. 32.Do the 1089 trick with 260: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 330: 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 6. What is that number?
35. 35.693 + 396 =
36. 36.Take 613. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 672. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 933: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 560: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 630: reverse and subtract, then reverse that answer and add. What do you get?

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