1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 248 · 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.Take 762. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.792 + 297 =
4. 4.495 + 594 =
5. 5.Do the 1089 trick with 891: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
7. 7.Take 367. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 137: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 147. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 951. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 441: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 451: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 346. 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 5. What is that number?
15. 15.Take 802. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 903: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 456. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 138: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.297 + 792 =
20. 20.Take 290. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.594 + 495 =
22. 22.Take 184. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 570: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 388. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
28. 28.Take 528. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 886: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.891 + 198 =
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
32. 32.Take 851. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 491. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 289: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 611. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 510. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.198 + 891 =
39. 39.Take 527. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 300. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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