1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 408 · 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 8. What is that number?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
3. 3.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.297 + 792 =
5. 5.891 + 198 =
6. 6.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 913. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
10. 10.198 + 891 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
12. 12.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.495 + 594 =
14. 14.Take 895. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 470. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 682: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 688: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 873: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
23. 23.Take 371. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 703: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 250. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.396 + 693 =
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
29. 29.Do the 1089 trick with 701: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 609. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 651: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 793: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.594 + 495 =
34. 34.792 + 297 =
35. 35.Take 153. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 320: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 944: reverse and subtract, then reverse that answer and add. 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.Take 602. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 478: reverse and subtract, then reverse that answer and add. What do you get?

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