1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 770 · 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 5. What is that number?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
3. 3.Take 855. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
5. 5.198 + 891 =
6. 6.Take 139. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.297 + 792 =
8. 8.Do the 1089 trick with 447: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.396 + 693 =
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
11. 11.Take 862. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 135. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
16. 16.594 + 495 =
17. 17.Take 195. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 174. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 966. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
21. 21.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
23. 23.Do the 1089 trick with 965: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 906: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 984: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 750: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 104. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 458: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 641. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 721. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.495 + 594 =
33. 33.Do the 1089 trick with 892: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 157. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 589. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 286: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 967: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.693 + 396 =
39. 39.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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