1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 354 · 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 558. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.693 + 396 =
3. 3.Do the 1089 trick with 662: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
5. 5.Do the 1089 trick with 497: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.891 + 198 =
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
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 5. What is that number?
10. 10.792 + 297 =
11. 11.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 197. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 864: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 300: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 325: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.198 + 891 =
18. 18.Take 256. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 902: 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 4. What is that number?
21. 21.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 816. Reverse its digits and take the smaller number away from the bigger one. 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.Take 479. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 400: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 923. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.495 + 594 =
29. 29.Do the 1089 trick with 700: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 408: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 633. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
33. 33.Take 167. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 290: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 193. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 614: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 418: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 420. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 462. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 311. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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