1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 177 · 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 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 954: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
4. 4.Take 816. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.297 + 792 =
6. 6.Take 123. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
8. 8.198 + 891 =
9. 9.Do the 1089 trick with 189: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 187. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 157: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 326. 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 8. What is that number?
14. 14.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 921: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.693 + 396 =
17. 17.Take 420. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 309: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.396 + 693 =
20. 20.Take 811. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.495 + 594 =
22. 22.Take 218. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 339. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.792 + 297 =
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
26. 26.Take 886. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 991: 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.Take 480. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 997: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 660. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 922: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 709: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.891 + 198 =
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
37. 37.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.594 + 495 =
39. 39.Do the 1089 trick with 348: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 502: reverse and subtract, then reverse that answer and add. What do you get?

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