1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 455 · 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 480. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.891 + 198 =
3. 3.Take 346. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.495 + 594 =
6. 6.Do the 1089 trick with 815: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
8. 8.297 + 792 =
9. 9.Do the 1089 trick with 684: 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 3. What is that number?
11. 11.Take 962. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 905. 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 6. What is that number?
14. 14.Do the 1089 trick with 723: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
17. 17.693 + 396 =
18. 18.594 + 495 =
19. 19.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 278: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 268. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.792 + 297 =
25. 25.Take 733. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 508. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 274: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 650. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
30. 30.396 + 693 =
31. 31.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 197: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 905: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
35. 35.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 934. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
38. 38.Do the 1089 trick with 603: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 527: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 891: reverse and subtract, then reverse that answer and add. What do you get?

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