1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 240 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
2. 2.Do the 1089 trick with 911: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
4. 4.495 + 594 =
5. 5.Take 621. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
9. 9.Take 155. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 862. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
12. 12.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 105. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
15. 15.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 174. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
19. 19.198 + 891 =
20. 20.Take 508. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 143. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 785. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 489: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 335. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 528: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 951. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.693 + 396 =
30. 30.Take 971. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 280: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 688. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 926. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 208. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 764: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 511. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 159. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 961: reverse and subtract, then reverse that answer and add. What do you get?

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