1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 700 · 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 914. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.198 + 891 =
3. 3.Take 995. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 910: 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 5. What is that number?
6. 6.Do the 1089 trick with 782: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.396 + 693 =
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
9. 9.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 711. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
12. 12.Take 449. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 321: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.693 + 396 =
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
17. 17.Take 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.792 + 297 =
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
20. 20.Do the 1089 trick with 127: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.495 + 594 =
22. 22.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 765: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 974. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 801. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 911: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 335. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 815. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
31. 31.Take 638. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 477. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
34. 34.Do the 1089 trick with 427: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 935: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 270: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 412: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 641. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 942. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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