1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 250 · 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 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 337: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 660: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 418: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 210. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 690: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.396 + 693 =
10. 10.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 743. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 144: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 492. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
18. 18.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 418. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.495 + 594 =
21. 21.198 + 891 =
22. 22.Take 732. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 296. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.594 + 495 =
25. 25.Do the 1089 trick with 712: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.891 + 198 =
27. 27.297 + 792 =
28. 28.Take 690. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 740: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 229. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 990: 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 5. What is that number?
33. 33.Do the 1089 trick with 119: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
35. 35.Take 653. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 226: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 126. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 338: reverse and subtract, then reverse that answer and add. What do you get?

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