1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 867 · 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.Do the 1089 trick with 825: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
4. 4.Take 440. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
6. 6.198 + 891 =
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
9. 9.Take 206. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 250. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.396 + 693 =
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
13. 13.Do the 1089 trick with 108: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 912: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.792 + 297 =
16. 16.Take 572. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 540. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.297 + 792 =
19. 19.Take 340. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 966: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 771: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 300. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.891 + 198 =
27. 27.Do the 1089 trick with 326: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 806. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 209. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 163. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 770: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
34. 34.Do the 1089 trick with 270: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 500. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 284. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 953. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 911: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 983. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 680: reverse and subtract, then reverse that answer and add. What do you get?

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