1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 471 · 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 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
4. 4.Do the 1089 trick with 360: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 811: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.198 + 891 =
7. 7.Take 269. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.594 + 495 =
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
10. 10.Do the 1089 trick with 692: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.396 + 693 =
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
14. 14.Do the 1089 trick with 875: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 164: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 946: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 159: 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.Take 356. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 973. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 821. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
24. 24.Take 124. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 275: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 258: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.792 + 297 =
31. 31.Take 962. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.693 + 396 =
33. 33.Take 264. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 725. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 139. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 350. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 733. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 279. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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