1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 169 · 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 632. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 905: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 284: 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 3. What is that number?
5. 5.Do the 1089 trick with 662: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
8. 8.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.495 + 594 =
10. 10.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 479. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 183: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
16. 16.792 + 297 =
17. 17.Take 466. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 295: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.198 + 891 =
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
22. 22.891 + 198 =
23. 23.Take 941. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 275: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 862: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 805. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 789. 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 881: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 308. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.396 + 693 =
34. 34.Take 713. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 265. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 995. 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 7. What is that number?
39. 39.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 230. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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