1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 529 · 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.Do the 1089 trick with 159: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
3. 3.Take 184. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 502. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
6. 6.198 + 891 =
7. 7.Do the 1089 trick with 389: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 628. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 208. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 771. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 305. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 145. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
15. 15.Do the 1089 trick with 410: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 381. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.891 + 198 =
18. 18.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 299. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.396 + 693 =
23. 23.693 + 396 =
24. 24.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 601. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
27. 27.792 + 297 =
28. 28.Take 629. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 891: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
34. 34.Do the 1089 trick with 592: reverse and subtract, then reverse that answer and add. 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 398. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.297 + 792 =
40. 40.Take 457. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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