1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 83 · 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.Do the 1089 trick with 784: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 479: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.495 + 594 =
5. 5.693 + 396 =
6. 6.Take 560. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
8. 8.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 684: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 309. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
13. 13.Take 905. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 936. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 703: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 951: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.396 + 693 =
19. 19.Take 236. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 350. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 188: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 204. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 894: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 287: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
27. 27.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 159: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.198 + 891 =
30. 30.Do the 1089 trick with 599: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 528: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 690: 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 4. What is that number?
35. 35.Do the 1089 trick with 924: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.297 + 792 =
37. 37.Take 411. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 326. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 325: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 853. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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