1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 330 · 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.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 492. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.693 + 396 =
4. 4.Take 237. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 932. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
7. 7.Take 145. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 412: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.594 + 495 =
10. 10.Take 835. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.198 + 891 =
12. 12.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
15. 15.Take 456. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 398. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 562: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 783. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 217. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 771. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
25. 25.Take 290. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 234: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 459: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 571. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 400: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
33. 33.792 + 297 =
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
35. 35.Do the 1089 trick with 285: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 300. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 873: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 934. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 517. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 553: reverse and subtract, then reverse that answer and add. What do you get?

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