1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 131 · 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 1. What is that number?
2. 2.Take 345. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 964: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 711: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
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 872: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 860. 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 3. What is that number?
12. 12.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 355: 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. 15.693 + 396 =
16. 16.Do the 1089 trick with 907: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 174: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 986: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 771: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 571. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.792 + 297 =
23. 23.Do the 1089 trick with 923: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
25. 25.495 + 594 =
26. 26.594 + 495 =
27. 27.Do the 1089 trick with 107: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 592: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
30. 30.Do the 1089 trick with 139: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.891 + 198 =
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
33. 33.Do the 1089 trick with 376: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 804. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 620: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 388. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 249: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 550. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 340: reverse and subtract, then reverse that answer and add. What do you get?

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