1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 840 · 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.Do the 1089 trick with 517: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.Do the 1089 trick with 259: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.297 + 792 =
4. 4.Take 305. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
6. 6.Do the 1089 trick with 114: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 135. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
10. 10.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 277: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 729. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.495 + 594 =
15. 15.Take 432. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.396 + 693 =
17. 17.Take 803. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.792 + 297 =
20. 20.Take 492. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 345. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 749. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
24. 24.198 + 891 =
25. 25.Do the 1089 trick with 660: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 358. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 487. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 205: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 420. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
33. 33.Do the 1089 trick with 368: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.594 + 495 =
35. 35.Take 804. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 682. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 210. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
39. 39.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 144. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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