1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 273 · 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. 1.297 + 792 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
3. 3.396 + 693 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
6. 6.Take 139. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 255. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 155: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.891 + 198 =
11. 11.Do the 1089 trick with 369: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 964: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
15. 15.198 + 891 =
16. 16.Take 915. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 117. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 931: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.693 + 396 =
20. 20.Take 138. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 927. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 956. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 227. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 500: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 601. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 553. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
30. 30.Take 911. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 994. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 217: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 419. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.495 + 594 =
37. 37.Take 981. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 562. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 836: reverse and subtract, then reverse that answer and add. What do you get?

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