1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 270 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
4. 4.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 671. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 660. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 900: 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 8. What is that number?
9. 9.Take 153. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 501. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 709. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 416: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.198 + 891 =
14. 14.495 + 594 =
15. 15.Take 623. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 200. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 123. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 559: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 470. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
25. 25.Do the 1089 trick with 964: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.693 + 396 =
27. 27.396 + 693 =
28. 28.Take 661. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
30. 30.Do the 1089 trick with 863: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 775: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
35. 35.Do the 1089 trick with 128: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
37. 37.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 871. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 925. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 385. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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