1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 15 · 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 861. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
3. 3.Do the 1089 trick with 255: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
5. 5.Take 510. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.495 + 594 =
7. 7.Take 426. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
9. 9.396 + 693 =
10. 10.Take 502. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 660. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
13. 13.594 + 495 =
14. 14.Do the 1089 trick with 439: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.693 + 396 =
17. 17.Take 954. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.792 + 297 =
21. 21.Take 280. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 965. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 911. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 931. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
27. 27.Do the 1089 trick with 699: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 749. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 309: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 614. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 904: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 975: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 761. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.198 + 891 =
35. 35.Take 802. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.297 + 792 =
37. 37.Take 209. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.891 + 198 =
39. 39.Do the 1089 trick with 965: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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