1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 404 · 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.Do the 1089 trick with 712: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Take 416. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
4. 4.594 + 495 =
5. 5.Do the 1089 trick with 229: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 309. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 901: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
9. 9.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 670. 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 3. What is that number?
12. 12.Do the 1089 trick with 340: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.396 + 693 =
14. 14.Do the 1089 trick with 652: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 760. 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 8. What is that number?
17. 17.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
19. 19.Take 531. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 459. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.693 + 396 =
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
23. 23.Take 194. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 497. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 227. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 143: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 543: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 533: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 478: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 792. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 149. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.495 + 594 =
34. 34.Do the 1089 trick with 942: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
36. 36.297 + 792 =
37. 37.Take 106. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 664. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 833. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 127: reverse and subtract, then reverse that answer and add. What do you get?

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