1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 352 · 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.Take 612. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
3. 3.Take 997. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 197: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 906. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
7. 7.198 + 891 =
8. 8.Do the 1089 trick with 942: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 294: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.297 + 792 =
11. 11.Do the 1089 trick with 749: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.396 + 693 =
13. 13.Do the 1089 trick with 208: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.594 + 495 =
15. 15.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
17. 17.Take 811. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 782: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 680. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
24. 24.Do the 1089 trick with 911: 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.Take 216. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 651: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.792 + 297 =
29. 29.Do the 1089 trick with 103: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 109: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 901: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 945. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
36. 36.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.891 + 198 =
38. 38.Do the 1089 trick with 709: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 560. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 882: reverse and subtract, then reverse that answer and add. What do you get?

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