1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 100 · 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 724. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 339. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 927. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 693: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 268. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 629. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 986: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.297 + 792 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
12. 12.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 156. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 967. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 650. 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.Do the 1089 trick with 916: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 587. Reverse its digits and take the smaller number away from the bigger one. 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. 20.792 + 297 =
21. 21.Take 953. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 550. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 806. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 379. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 442. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 761: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
29. 29.Take 986. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 457: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.693 + 396 =
32. 32.Take 604. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
34. 34.Do the 1089 trick with 158: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.495 + 594 =
36. 36.Take 472. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 600: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.891 + 198 =
40. 40.Take 922. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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