1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 855 · 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 407. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 681. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 832. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.495 + 594 =
5. 5.Take 955. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.297 + 792 =
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
8. 8.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.198 + 891 =
10. 10.693 + 396 =
11. 11.Take 715. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 490. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 532. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 185: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 410: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
22. 22.Do the 1089 trick with 957: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
24. 24.792 + 297 =
25. 25.Take 326. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 139. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 297: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
30. 30.891 + 198 =
31. 31.Take 218. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 420: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 137: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
36. 36.Take 206. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 264: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 853. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 164. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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