1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 390 · 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 2. What is that number?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
3. 3.Do the 1089 trick with 270: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.693 + 396 =
5. 5.Take 549. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 990. 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 3. What is that number?
8. 8.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
10. 10.594 + 495 =
11. 11.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.495 + 594 =
15. 15.Take 568. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 925. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
18. 18.Take 520. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 431. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 874. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 103: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
24. 24.Take 802. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 765: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.396 + 693 =
27. 27.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
29. 29.Take 462. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.297 + 792 =
31. 31.198 + 891 =
32. 32.Do the 1089 trick with 530: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 664: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 831: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.792 + 297 =
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
37. 37.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 561: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 733. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 901: reverse and subtract, then reverse that answer and add. What do you get?

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