1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 361 · 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 174. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 582. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
4. 4.Do the 1089 trick with 650: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.297 + 792 =
6. 6.Take 286. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 954. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.594 + 495 =
9. 9.Do the 1089 trick with 680: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.396 + 693 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
12. 12.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.693 + 396 =
14. 14.Do the 1089 trick with 207: reverse and subtract, then reverse that answer and add. 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. 16.891 + 198 =
17. 17.Do the 1089 trick with 199: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 713: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 175: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.198 + 891 =
22. 22.Take 169. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 812: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.792 + 297 =
26. 26.Take 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 396. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 895. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 977: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 823. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 168. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 360: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 791. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 759: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 660: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 309. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 540. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 951. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 299. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?

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