1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 535 · 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 173. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.693 + 396 =
3. 3.Take 753. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
6. 6.891 + 198 =
7. 7.792 + 297 =
8. 8.198 + 891 =
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
11. 11.Take 128. 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 4. What is that number?
13. 13.Do the 1089 trick with 740: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
15. 15.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 957: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 711: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 914. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 387: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.396 + 693 =
22. 22.Take 248. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 801: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 703: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
26. 26.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 977: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 198: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 821. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 237: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 914: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.297 + 792 =
33. 33.Take 360. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
35. 35.Do the 1089 trick with 722: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 904. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 628: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 268. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 238. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 401. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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