1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 843 · 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 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.396 + 693 =
3. 3.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 742. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 329. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.198 + 891 =
7. 7.Take 573. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 703. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.693 + 396 =
10. 10.Take 249. 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 5. What is that number?
12. 12.Take 318. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 330: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
18. 18.Do the 1089 trick with 561: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.594 + 495 =
20. 20.Do the 1089 trick with 931: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 567. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 441: 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 1. What is that number?
24. 24.Take 781. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.297 + 792 =
27. 27.Do the 1089 trick with 400: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.792 + 297 =
29. 29.Do the 1089 trick with 268: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 944. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 350. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 219. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 138: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
37. 37.Do the 1089 trick with 461: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 902: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 587. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 156: reverse and subtract, then reverse that answer and add. What do you get?

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