1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 287 · 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 3. What is that number?
2. 2.297 + 792 =
3. 3.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 639. 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 8. What is that number?
6. 6.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 981: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
10. 10.Take 981. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 478: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
16. 16.594 + 495 =
17. 17.Do the 1089 trick with 803: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.495 + 594 =
19. 19.Take 158. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 421. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
22. 22.Take 109. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 915: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 922. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 902: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 833. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 500: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 178: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 355. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 147. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 853. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.693 + 396 =
35. 35.Do the 1089 trick with 962: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.792 + 297 =
37. 37.Do the 1089 trick with 511: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
39. 39.Do the 1089 trick with 406: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 268: reverse and subtract, then reverse that answer and add. What do you get?

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