1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 235 · 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 7. What is that number?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
4. 4.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 821. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 385: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 298. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 460: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 593: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 114: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 220: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
14. 14.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.792 + 297 =
16. 16.396 + 693 =
17. 17.Do the 1089 trick with 387: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.297 + 792 =
19. 19.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 360: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 287. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.495 + 594 =
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
24. 24.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 259: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
27. 27.Take 814. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 390. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 608: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 411. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.198 + 891 =
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
33. 33.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 789. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 628: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 538. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 806: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.693 + 396 =
39. 39.Do the 1089 trick with 866: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 681. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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