1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 754 · 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 3. What is that number?
2. 2.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
5. 5.Do the 1089 trick with 911: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 220. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
8. 8.Do the 1089 trick with 670: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 118. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 198. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
12. 12.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.495 + 594 =
14. 14.Take 923. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 209: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 941. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 587. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 187. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.297 + 792 =
20. 20.693 + 396 =
21. 21.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.792 + 297 =
23. 23.Do the 1089 trick with 144: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.594 + 495 =
25. 25.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 682: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 402. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 744: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 735: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 209. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 216. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 508. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 520. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
37. 37.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 651. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?

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