1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 809 · 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 5. 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.Do the 1089 trick with 813: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
5. 5.Do the 1089 trick with 153: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
7. 7.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 168. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
12. 12.Do the 1089 trick with 176: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.396 + 693 =
14. 14.297 + 792 =
15. 15.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 763: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 307. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 651: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 108: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 885. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 578. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.594 + 495 =
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
25. 25.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 215. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 680. 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 2. What is that number?
29. 29.198 + 891 =
30. 30.891 + 198 =
31. 31.Do the 1089 trick with 109: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 902. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 560: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 712. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 456: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.495 + 594 =
38. 38.Take 589. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.792 + 297 =
40. 40.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?

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