1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 447 · 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 831. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.495 + 594 =
3. 3.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 327. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 982: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.297 + 792 =
8. 8.891 + 198 =
9. 9.Take 285. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 679. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.198 + 891 =
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
13. 13.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.594 + 495 =
15. 15.Do the 1089 trick with 805: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.792 + 297 =
18. 18.Take 569. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 259. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 103: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 996: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 337. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
25. 25.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 971. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
28. 28.Take 167. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 388: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
31. 31.Take 664. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 761: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 361: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.396 + 693 =
35. 35.Take 529. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 876: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 573. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 513. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 178: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 883. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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