1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 605 · 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 3. What is that number?
2. 2.792 + 297 =
3. 3.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.594 + 495 =
6. 6.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
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 640: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 358. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
11. 11.Do the 1089 trick with 824: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.297 + 792 =
13. 13.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 450. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 550: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.198 + 891 =
17. 17.891 + 198 =
18. 18.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 266. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 540. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.495 + 594 =
22. 22.Do the 1089 trick with 913: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
24. 24.Do the 1089 trick with 631: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
28. 28.Do the 1089 trick with 906: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 290. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 330: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 631. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 200. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 137: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 619. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 329. Reverse its digits and take the smaller number away from the bigger one. 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.Take 420. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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