1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 833 · 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 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 812: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 732. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.396 + 693 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
6. 6.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
8. 8.Take 639. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 903: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 188. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.792 + 297 =
12. 12.Do the 1089 trick with 911: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 298. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 397: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
16. 16.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.891 + 198 =
18. 18.693 + 396 =
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
20. 20.Take 793. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.594 + 495 =
22. 22.Take 164. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 972: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
26. 26.Do the 1089 trick with 671: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 129: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 159: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.297 + 792 =
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
32. 32.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 971. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 885. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 723: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 917. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
39. 39.Do the 1089 trick with 693: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 146. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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