1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 642 · 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 6. What is that number?
2. 2.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
4. 4.Take 632. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
6. 6.Take 139. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 699: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
9. 9.Take 279. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 461. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 431: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 442. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. 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.Do the 1089 trick with 167: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
20. 20.Take 761. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 885: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 491. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.396 + 693 =
24. 24.Do the 1089 trick with 590: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 904. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 806: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
28. 28.Do the 1089 trick with 935: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 318. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.792 + 297 =
31. 31.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.297 + 792 =
33. 33.891 + 198 =
34. 34.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 587. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.594 + 495 =
37. 37.Take 189. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 609. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 628: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 537: reverse and subtract, then reverse that answer and add. What do you get?

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