1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 376 · 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 1. What is that number?
2. 2.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.891 + 198 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
5. 5.Take 833. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 937: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 290: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 129: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.297 + 792 =
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
14. 14.792 + 297 =
15. 15.Do the 1089 trick with 741: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.396 + 693 =
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
20. 20.Take 811. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 149. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 691: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 765. 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 6. What is that number?
25. 25.198 + 891 =
26. 26.Take 300. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 189. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 502: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
30. 30.Do the 1089 trick with 336: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 953. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 368. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 711: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 335: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 138: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 114. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 357. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.594 + 495 =
39. 39.495 + 594 =
40. 40.Do the 1089 trick with 911: reverse and subtract, then reverse that answer and add. What do you get?

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