1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 13 · 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.Take 705. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 876. 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 1. What is that number?
4. 4.Do the 1089 trick with 205: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.594 + 495 =
7. 7.Take 301. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.198 + 891 =
9. 9.Do the 1089 trick with 492: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
12. 12.Take 993. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 359: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 739. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.891 + 198 =
16. 16.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
18. 18.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.495 + 594 =
20. 20.297 + 792 =
21. 21.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 260: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.396 + 693 =
25. 25.Take 713. 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 3. What is that number?
27. 27.Do the 1089 trick with 501: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 953: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 741: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 620: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 790: 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.Take 590. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
35. 35.Do the 1089 trick with 236: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 972: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 497. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 430. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 175. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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