1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 417 · 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 8. What is that number?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
3. 3.Take 107. Reverse its digits and take the smaller number away from the bigger one. 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. 5.891 + 198 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
7. 7.Take 390. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 855. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 179. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
11. 11.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.198 + 891 =
13. 13.Take 791. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 400. 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 127: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.396 + 693 =
18. 18.792 + 297 =
19. 19.Take 961. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.297 + 792 =
21. 21.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 388. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 975: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 490: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 331: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 749. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.594 + 495 =
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
31. 31.Take 250. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 885. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 560. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 893: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 288. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 924: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 735. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 631. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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