1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 691 · 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 1. What is that number?
2. 2.Do the 1089 trick with 763: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
5. 5.693 + 396 =
6. 6.Take 775. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.891 + 198 =
10. 10.198 + 891 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
12. 12.Take 691. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.396 + 693 =
14. 14.Take 872. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
18. 18.Do the 1089 trick with 189: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 932. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 940. 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 6. What is that number?
24. 24.Take 664. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.792 + 297 =
26. 26.Do the 1089 trick with 690: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 661: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 644. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 816. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 227. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
34. 34.594 + 495 =
35. 35.Take 295. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 147. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 210: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 770. 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 5. What is that number?

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