1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 101 · 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 916. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.495 + 594 =
3. 3.Take 549. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 144: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 456: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
7. 7.Take 933. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.198 + 891 =
9. 9.396 + 693 =
10. 10.693 + 396 =
11. 11.Do the 1089 trick with 229: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 439: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
14. 14.891 + 198 =
15. 15.Do the 1089 trick with 593: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 580: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 774: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 751. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 961. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 814. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.297 + 792 =
24. 24.594 + 495 =
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
26. 26.Take 825. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
29. 29.Do the 1089 trick with 228: 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 1. What is that number?
31. 31.Take 377. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 148. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 864. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 871. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
37. 37.Do the 1089 trick with 992: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 845. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 813: reverse and subtract, then reverse that answer and add. What do you get?

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