1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 488 · 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.Take 993. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 106. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
4. 4.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
8. 8.198 + 891 =
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
11. 11.693 + 396 =
12. 12.Take 153. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 297: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 380: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 540. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 744. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 107. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.495 + 594 =
19. 19.Take 975. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.891 + 198 =
22. 22.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.396 + 693 =
24. 24.Take 785. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 906: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 976. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 971. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
31. 31.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 104: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.594 + 495 =
34. 34.297 + 792 =
35. 35.Take 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
37. 37.Take 901. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 600: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 730: reverse and subtract, then reverse that answer and add. What do you get?

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