1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 122 · 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 7. What is that number?
2. 2.Do the 1089 trick with 356: reverse and subtract, then reverse that answer and add. 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
5. 5.Do the 1089 trick with 930: 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
8. 8.396 + 693 =
9. 9.198 + 891 =
10. 10.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 467. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 688: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 188. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 258. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.594 + 495 =
16. 16.297 + 792 =
17. 17.Take 520. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 763. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 699: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 866: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 177: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 600: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.693 + 396 =
24. 24.Do the 1089 trick with 147: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 813: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
27. 27.Take 114. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 510. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 109. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 670: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 339: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 158. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.891 + 198 =
37. 37.Do the 1089 trick with 409: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 851. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 550: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 570. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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