1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 492 · 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 814. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 902: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 450: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.594 + 495 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
6. 6.Do the 1089 trick with 642: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 419. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.396 + 693 =
9. 9.Take 641. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.891 + 198 =
11. 11.Take 743. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 831. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
14. 14.Do the 1089 trick with 183: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 149. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 199. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
18. 18.Do the 1089 trick with 500: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.693 + 396 =
20. 20.Do the 1089 trick with 921: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
22. 22.Take 851. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 329: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 300: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 860: 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 4. What is that number?
28. 28.Do the 1089 trick with 320: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.792 + 297 =
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
31. 31.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 441. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 932: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 256: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.297 + 792 =
39. 39.Take 911. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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