1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 517 · 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 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.495 + 594 =
3. 3.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 502: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.198 + 891 =
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 5. What is that number?
8. 8.Do the 1089 trick with 299: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
10. 10.Take 688. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 209: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 661. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.297 + 792 =
14. 14.Take 832. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 154. 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 7. What is that number?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
18. 18.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.396 + 693 =
20. 20.Take 256. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 280. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.594 + 495 =
24. 24.Do the 1089 trick with 591: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.693 + 396 =
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
27. 27.Take 169. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.891 + 198 =
29. 29.Do the 1089 trick with 845: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 937: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
32. 32.Do the 1089 trick with 769: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 462: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 894. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 926. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 204: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 136. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 630: reverse and subtract, then reverse that answer and add. What do you get?

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