1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 794 · 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 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 109: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
4. 4.396 + 693 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
6. 6.Take 247. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.198 + 891 =
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
9. 9.Do the 1089 trick with 650: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 317: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 523: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 611: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.891 + 198 =
14. 14.792 + 297 =
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
16. 16.Do the 1089 trick with 632: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 244: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.297 + 792 =
19. 19.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
21. 21.Do the 1089 trick with 651: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 940: 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 711. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 723. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 995: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
30. 30.Do the 1089 trick with 402: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
32. 32.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 189: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 684. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 370: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 269: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.693 + 396 =
39. 39.Take 774. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 825. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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