1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 586 · 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 900: 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 6. What is that number?
4. 4.Do the 1089 trick with 836: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 389: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.693 + 396 =
9. 9.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 699: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 257. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.792 + 297 =
13. 13.396 + 693 =
14. 14.Do the 1089 trick with 183: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 478. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 573. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 901. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.891 + 198 =
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
20. 20.Do the 1089 trick with 499: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.594 + 495 =
22. 22.Do the 1089 trick with 482: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.297 + 792 =
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
25. 25.198 + 891 =
26. 26.Do the 1089 trick with 154: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
28. 28.Do the 1089 trick with 997: 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 7. What is that number?
30. 30.Do the 1089 trick with 866: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 278: 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 1. What is that number?
33. 33.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 970. 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 5. What is that number?
37. 37.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 159: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 447: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 469: reverse and subtract, then reverse that answer and add. What do you get?

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