1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 434 · 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 2. What is that number?
2. 2.Take 608. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.891 + 198 =
4. 4.Take 997. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 237: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 542. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 844: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.198 + 891 =
10. 10.Do the 1089 trick with 396: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.495 + 594 =
13. 13.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 661. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 422: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 157: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 870. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
22. 22.Do the 1089 trick with 671: reverse and subtract, then reverse that answer and add. 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.Take 770. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 106: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 540. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 442. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 927: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 936. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.297 + 792 =
31. 31.Do the 1089 trick with 890: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 523. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 591. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.693 + 396 =
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
36. 36.594 + 495 =
37. 37.Do the 1089 trick with 490: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
40. 40.Take 359. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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