1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 701 · 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 147. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 470. 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 1. What is that number?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
5. 5.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 205. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 206. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 972. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 518. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 290. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
14. 14.Do the 1089 trick with 308: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 306. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.693 + 396 =
17. 17.891 + 198 =
18. 18.Take 792. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 651. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.297 + 792 =
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
23. 23.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 420. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
26. 26.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 412. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 876. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 904: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 189. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 287: 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 6. What is that number?
33. 33.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.594 + 495 =
35. 35.495 + 594 =
36. 36.Take 569. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 744: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
40. 40.Take 674. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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