1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 818 · 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 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.297 + 792 =
3. 3.594 + 495 =
4. 4.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. 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.Take 500. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 307: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 156: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
13. 13.693 + 396 =
14. 14.Do the 1089 trick with 432: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 750: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
17. 17.Take 388. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
20. 20.Take 901. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 371: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 846: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 972: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.792 + 297 =
25. 25.Take 891. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 249. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 340. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 943. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 148. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 569. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
33. 33.Do the 1089 trick with 926: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.396 + 693 =
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
39. 39.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 803: reverse and subtract, then reverse that answer and add. What do you get?

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