1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 587 · 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 5. What is that number?
2. 2.Take 290. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.891 + 198 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
5. 5.Do the 1089 trick with 389: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 967. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 412. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 284: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 725: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
12. 12.297 + 792 =
13. 13.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.198 + 891 =
15. 15.Take 896. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 976: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.396 + 693 =
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
19. 19.Do the 1089 trick with 428: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 248. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 931: 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 8. What is that number?
24. 24.495 + 594 =
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
26. 26.Take 109. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
28. 28.Do the 1089 trick with 661: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 450: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.693 + 396 =
31. 31.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.594 + 495 =
34. 34.792 + 297 =
35. 35.Take 992. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 750: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 683. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 149. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?

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