1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 329 · 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 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 451. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 174. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.693 + 396 =
5. 5.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
7. 7.495 + 594 =
8. 8.198 + 891 =
9. 9.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 400: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.297 + 792 =
12. 12.Take 239. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 539: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 921. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
17. 17.Take 106. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 923: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 471. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 981. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
23. 23.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 116. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 906: 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 5. What is that number?
27. 27.Take 732. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 913: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 351: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.891 + 198 =
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
32. 32.Take 420. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 952. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 280: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 921: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 300: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 335. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.594 + 495 =

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