1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 541 · 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 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 560: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 155: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 509. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 891: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.297 + 792 =
9. 9.396 + 693 =
10. 10.Do the 1089 trick with 643: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 560. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.198 + 891 =
16. 16.Take 974. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
18. 18.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 307. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 841: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
23. 23.Do the 1089 trick with 792: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
25. 25.Take 255. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.891 + 198 =
27. 27.Do the 1089 trick with 317: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 366. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 875. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.693 + 396 =
31. 31.Do the 1089 trick with 158: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
33. 33.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.594 + 495 =
35. 35.Take 952. 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 6. What is that number?
37. 37.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
39. 39.495 + 594 =
40. 40.Do the 1089 trick with 280: reverse and subtract, then reverse that answer and add. What do you get?

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