1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 581 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
2. 2.Take 552. 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 7. What is that number?
4. 4.Do the 1089 trick with 319: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
6. 6.Take 159. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.594 + 495 =
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
9. 9.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 944. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 173: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 487: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 631. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.891 + 198 =
16. 16.Do the 1089 trick with 629: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.297 + 792 =
19. 19.Take 523. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.792 + 297 =
21. 21.Take 901. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 482: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 843. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.396 + 693 =
25. 25.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 461: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.693 + 396 =
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
29. 29.Take 905. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.198 + 891 =
31. 31.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 942. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
34. 34.Do the 1089 trick with 724: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 199. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 690: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 528. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 513: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 126: reverse and subtract, then reverse that answer and add. What do you get?

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