1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 695 · 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.Do the 1089 trick with 762: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 127: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 194. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 931: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 913. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 991: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 224: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 845: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 540: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 730. 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 2. What is that number?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
13. 13.Do the 1089 trick with 338: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 573. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.792 + 297 =
16. 16.495 + 594 =
17. 17.594 + 495 =
18. 18.Take 683. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
20. 20.Do the 1089 trick with 149: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.891 + 198 =
22. 22.Do the 1089 trick with 650: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 771: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
25. 25.396 + 693 =
26. 26.Take 866. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 246. 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 375. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 991. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 441: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 480. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 547. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 852. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 138. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 561: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 653. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
39. 39.Do the 1089 trick with 249: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?

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