1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 738 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
3. 3.495 + 594 =
4. 4.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 982. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 337. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 577: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 700: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.792 + 297 =
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
14. 14.Do the 1089 trick with 270: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 178. 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 1. What is that number?
17. 17.297 + 792 =
18. 18.Do the 1089 trick with 378: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.198 + 891 =
20. 20.Do the 1089 trick with 509: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 549. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
24. 24.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 250. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 288. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 400: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 336. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.891 + 198 =
31. 31.Do the 1089 trick with 812: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 133: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
34. 34.Do the 1089 trick with 502: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 510: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 802. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 167. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 311. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 408. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 732. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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