1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 413 · 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 2. What is that number?
2. 2.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
4. 4.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 134. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 588. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 826: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 153. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
10. 10.Take 421. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 481. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 214. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 621. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 670. 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
18. 18.Take 986. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 842: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.396 + 693 =
21. 21.Do the 1089 trick with 259: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 613. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.693 + 396 =
24. 24.198 + 891 =
25. 25.594 + 495 =
26. 26.Do the 1089 trick with 523: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 480. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 996. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.792 + 297 =
31. 31.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 802. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 651: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 209. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 210. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 490: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 784. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 521: reverse and subtract, then reverse that answer and add. What do you get?

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