1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 314 · 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.Take 651. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 138: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 994: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
8. 8.792 + 297 =
9. 9.297 + 792 =
10. 10.Take 799. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 971: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
15. 15.Take 991. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.891 + 198 =
17. 17.495 + 594 =
18. 18.198 + 891 =
19. 19.Do the 1089 trick with 634: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 841: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 970: 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 4. What is that number?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
25. 25.594 + 495 =
26. 26.Take 976. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.396 + 693 =
28. 28.Do the 1089 trick with 107: 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 2. What is that number?
30. 30.Take 812. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 711. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 719. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 906. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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