1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 593 · 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 6. What is that number?
2. 2.Do the 1089 trick with 679: 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 2. What is that number?
4. 4.Do the 1089 trick with 971: 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 8. What is that number?
6. 6.Take 167. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.594 + 495 =
8. 8.891 + 198 =
9. 9.198 + 891 =
10. 10.693 + 396 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
12. 12.Do the 1089 trick with 107: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 992: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.396 + 693 =
16. 16.Do the 1089 trick with 984: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 539: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 349. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
21. 21.Do the 1089 trick with 109: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 618. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.792 + 297 =
24. 24.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.297 + 792 =
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
28. 28.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 713: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 176: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 113. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.495 + 594 =
35. 35.Take 388. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 871: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 154. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 775: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 400: reverse and subtract, then reverse that answer and add. What do you get?

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