1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 256 · 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 7. What is that number?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
3. 3.Take 963. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 775. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 572. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 250: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 502. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 630. 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 1. What is that number?
12. 12.297 + 792 =
13. 13.Take 927. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 892. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 427. 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. 17.693 + 396 =
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
19. 19.792 + 297 =
20. 20.Take 772. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.594 + 495 =
22. 22.Take 278. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 865: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 723: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
26. 26.Do the 1089 trick with 876: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 513. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 467. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.198 + 891 =
30. 30.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 750. 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.Take 480. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 497. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.495 + 594 =
36. 36.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 951: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.396 + 693 =
40. 40.Take 321. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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