1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 514 · 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 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.792 + 297 =
3. 3.Do the 1089 trick with 400: 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 7. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
6. 6.693 + 396 =
7. 7.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 623. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 378: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.198 + 891 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
13. 13.396 + 693 =
14. 14.891 + 198 =
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
16. 16.Take 512. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
18. 18.Do the 1089 trick with 782: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 729: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 622: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
25. 25.Take 368. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 785: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 731: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 632: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 337: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 945: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 488: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.297 + 792 =
35. 35.Take 298. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 755: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 316. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 750: reverse and subtract, then reverse that answer and add. What do you get?

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