1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 580 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
2. 2.Take 128. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
4. 4.693 + 396 =
5. 5.396 + 693 =
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 1. What is that number?
8. 8.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 912. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.495 + 594 =
11. 11.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.297 + 792 =
13. 13.792 + 297 =
14. 14.Take 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
16. 16.Do the 1089 trick with 149: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
18. 18.Take 193. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 782: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 967: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 381: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 670: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 639. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
28. 28.Do the 1089 trick with 891: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 750: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 856. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 492. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 815. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.891 + 198 =
35. 35.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 490: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 400: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 194: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 365. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 749: reverse and subtract, then reverse that answer and add. What do you get?

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