1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 668 · 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 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 208. 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.Do the 1089 trick with 624: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
7. 7.Take 419. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 639. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.396 + 693 =
11. 11.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 895. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.495 + 594 =
14. 14.Take 286. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.297 + 792 =
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
17. 17.Do the 1089 trick with 895: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 931. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 623: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.198 + 891 =
21. 21.Take 762. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
23. 23.792 + 297 =
24. 24.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 401: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.891 + 198 =
27. 27.Do the 1089 trick with 216: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 145. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.594 + 495 =
30. 30.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
33. 33.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.693 + 396 =
35. 35.Take 741. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 164. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 600: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 902: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 711. 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 3. What is that number?

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