1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 542 · 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 469. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 996: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 937. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
5. 5.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.693 + 396 =
7. 7.396 + 693 =
8. 8.Take 851. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.297 + 792 =
10. 10.Do the 1089 trick with 830: 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 5. What is that number?
12. 12.Take 367. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 660: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.495 + 594 =
17. 17.Do the 1089 trick with 390: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
19. 19.Do the 1089 trick with 387: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 812. Reverse its digits and take the smaller number away from the bigger one. 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.Do the 1089 trick with 765: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.792 + 297 =
24. 24.Do the 1089 trick with 365: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 299. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 330. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 521: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
29. 29.Take 680. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 264. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 730: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 137: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 234. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
36. 36.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 468: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
40. 40.Take 927. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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