1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 667 · 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 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
4. 4.Do the 1089 trick with 321: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 550. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.198 + 891 =
7. 7.Do the 1089 trick with 674: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
10. 10.Do the 1089 trick with 590: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
12. 12.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 785: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 561. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.693 + 396 =
16. 16.Take 661. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 500. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 184: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.792 + 297 =
20. 20.Do the 1089 trick with 349: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.891 + 198 =
22. 22.Do the 1089 trick with 470: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
24. 24.Do the 1089 trick with 631: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 911. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
27. 27.Take 763. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 963: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 882: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 815: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 715: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 154. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 193: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 437. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 440: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.297 + 792 =
39. 39.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 285. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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