1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 767 · 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. 1.198 + 891 =
2. 2.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
4. 4.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 346. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 600: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 614. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.792 + 297 =
9. 9.Do the 1089 trick with 618: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
11. 11.594 + 495 =
12. 12.Do the 1089 trick with 508: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.495 + 594 =
14. 14.Take 257. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 650. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.297 + 792 =
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
19. 19.Take 892. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 371: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 961. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.693 + 396 =
23. 23.Do the 1089 trick with 560: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
26. 26.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 711: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 986. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 139. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 229. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 381: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.396 + 693 =
33. 33.Take 236. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 663: 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 1. What is that number?
36. 36.Take 601. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 668: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 801. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 901. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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