1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 225 · 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 1. What is that number?
2. 2.Do the 1089 trick with 183: 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 7. What is that number?
4. 4.Do the 1089 trick with 865: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.198 + 891 =
6. 6.Take 922. 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 8. What is that number?
8. 8.Do the 1089 trick with 522: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 428. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 228: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 548: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.693 + 396 =
13. 13.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 640: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 537: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.396 + 693 =
17. 17.Do the 1089 trick with 462: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
19. 19.792 + 297 =
20. 20.594 + 495 =
21. 21.Do the 1089 trick with 290: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 448. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 399. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 386. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 306: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 522. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.891 + 198 =
28. 28.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 560: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 396. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 694: 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 2. What is that number?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
34. 34.297 + 792 =
35. 35.Do the 1089 trick with 309: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 175. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 824: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?

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