1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 814 · 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 710. 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 4. What is that number?
3. 3.297 + 792 =
4. 4.Take 361. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
9. 9.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
11. 11.Take 975. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 417. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 174. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.198 + 891 =
16. 16.396 + 693 =
17. 17.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.594 + 495 =
19. 19.891 + 198 =
20. 20.Take 932. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 922: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.693 + 396 =
23. 23.Take 771. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 952: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 198. 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 1. What is that number?
27. 27.Do the 1089 trick with 349: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 984: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 318. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 125: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 620: 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 2. What is that number?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
34. 34.Do the 1089 trick with 300: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 279: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 670: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 185. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 611: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 650. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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