1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 532 · 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 1. What is that number?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
3. 3.396 + 693 =
4. 4.891 + 198 =
5. 5.Take 631. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 902. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 300: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 875: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
11. 11.792 + 297 =
12. 12.Take 149. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
14. 14.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
17. 17.594 + 495 =
18. 18.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 420: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 913: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 831: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 689: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
27. 27.Do the 1089 trick with 821: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 256. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.198 + 891 =
32. 32.Take 744. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 168: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.693 + 396 =
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
36. 36.Do the 1089 trick with 650: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 907. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 105. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.297 + 792 =

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