1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 875 · 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.Do the 1089 trick with 630: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
3. 3.594 + 495 =
4. 4.198 + 891 =
5. 5.693 + 396 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
8. 8.Do the 1089 trick with 438: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 805. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
12. 12.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 714: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 611. Reverse its digits and take the smaller number away from the bigger one. 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.Do the 1089 trick with 275: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 975. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.792 + 297 =
19. 19.Do the 1089 trick with 225: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.396 + 693 =
22. 22.Take 732. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
25. 25.Take 628. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 852: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 311: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.495 + 594 =
30. 30.Do the 1089 trick with 661: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 395: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 590: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 220: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 416: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 149. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 892. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 513. Reverse its digits and take the smaller number away from the bigger one. 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 442: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 471: reverse and subtract, then reverse that answer and add. What do you get?

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