1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 658 · 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 789. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 740: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 318. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.495 + 594 =
6. 6.396 + 693 =
7. 7.Take 518. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 841. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 287: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
11. 11.Take 883. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 997. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 437: 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.Take 985. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 219. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.198 + 891 =
18. 18.297 + 792 =
19. 19.Take 279. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.594 + 495 =
21. 21.Do the 1089 trick with 906: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
23. 23.Take 204. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.792 + 297 =
25. 25.Take 135. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 176: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
28. 28.Do the 1089 trick with 359: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
30. 30.Take 650. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 795. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 591: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 199: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 745. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 168. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 954. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 295. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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