1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 375 · 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.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
4. 4.Do the 1089 trick with 310: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 751. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 208: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.693 + 396 =
8. 8.891 + 198 =
9. 9.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 184. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 519. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
13. 13.792 + 297 =
14. 14.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 267: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 337. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 309. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.198 + 891 =
19. 19.Take 983. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 917. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 640: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 580: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.594 + 495 =
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
26. 26.Take 912. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 906. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.297 + 792 =
29. 29.Do the 1089 trick with 630: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 751: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.495 + 594 =
32. 32.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 154: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
36. 36.Do the 1089 trick with 943: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 775. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 972. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 602. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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