1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 425 · 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 4. What is that number?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
3. 3.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.693 + 396 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
6. 6.Do the 1089 trick with 733: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 699. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 499: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 409: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
13. 13.Take 349. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 247. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 209: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 155. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 743. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.495 + 594 =
20. 20.Do the 1089 trick with 771: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 601: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
23. 23.792 + 297 =
24. 24.297 + 792 =
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
26. 26.Do the 1089 trick with 730: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 715: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 614: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 472. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 503: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.396 + 693 =
33. 33.594 + 495 =
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
35. 35.198 + 891 =
36. 36.Do the 1089 trick with 743: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 620: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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