1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 36 · 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 793. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 511. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
5. 5.Take 266. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.396 + 693 =
7. 7.Do the 1089 trick with 905: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 350. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.792 + 297 =
10. 10.297 + 792 =
11. 11.Take 664. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.198 + 891 =
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
14. 14.Do the 1089 trick with 951: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 381: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 609. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 227. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.495 + 594 =
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
20. 20.Take 881. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.891 + 198 =
22. 22.Do the 1089 trick with 965: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 598. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 561. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 209. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.693 + 396 =
28. 28.Take 953. 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 6. What is that number?
30. 30.Take 973. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 210. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 197: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 924: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 602. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 294: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 229. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?

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