1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 267 · 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. 1.693 + 396 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
3. 3.Take 149. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 613: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.297 + 792 =
6. 6.Do the 1089 trick with 628: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 830. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 549: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
11. 11.Take 915. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 128. 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 4. What is that number?
14. 14.Do the 1089 trick with 198: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
17. 17.Take 349. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 936. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 941: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 563: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.396 + 693 =
22. 22.Take 921. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 994. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.198 + 891 =
25. 25.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.792 + 297 =
27. 27.891 + 198 =
28. 28.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 257. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
32. 32.Do the 1089 trick with 551: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 946. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 801: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 198. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 770: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
40. 40.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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