1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 566 · 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. 2.198 + 891 =
3. 3.Do the 1089 trick with 739: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 442. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.792 + 297 =
6. 6.Take 914. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.297 + 792 =
8. 8.693 + 396 =
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
11. 11.Do the 1089 trick with 865: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 143. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 960: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.891 + 198 =
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
17. 17.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 681. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
20. 20.Do the 1089 trick with 145: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 300: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 965. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.495 + 594 =
25. 25.Take 317. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 876. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 399. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 743: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 549: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 882: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 660: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 650: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 218. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 365. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 609. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 327. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 123. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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