1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 39 · 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 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 299: 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 4. What is that number?
4. 4.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 660. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.297 + 792 =
7. 7.Do the 1089 trick with 641: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
9. 9.Take 613. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 501: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 905. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.198 + 891 =
13. 13.Do the 1089 trick with 417: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 326: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 521. 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.Take 901. 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.Take 913. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 882. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
22. 22.Do the 1089 trick with 204: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 185: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
25. 25.Do the 1089 trick with 662: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 860: 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 1. What is that number?
28. 28.Do the 1089 trick with 609: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 127: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 123: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 789. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 761. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 502. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.594 + 495 =
37. 37.Do the 1089 trick with 761: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.693 + 396 =
39. 39.Do the 1089 trick with 165: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 255: reverse and subtract, then reverse that answer and add. What do you get?

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