1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 394 · 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. 1.891 + 198 =
2. 2.495 + 594 =
3. 3.198 + 891 =
4. 4.Do the 1089 trick with 134: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
6. 6.594 + 495 =
7. 7.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 510. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
10. 10.297 + 792 =
11. 11.Do the 1089 trick with 480: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 133. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
14. 14.Do the 1089 trick with 542: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 715. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
18. 18.Do the 1089 trick with 981: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.792 + 297 =
20. 20.Do the 1089 trick with 610: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.693 + 396 =
23. 23.Do the 1089 trick with 769: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 440: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 169. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 500. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 127. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 369. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
31. 31.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 207. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 360: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 816. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 813: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
37. 37.Take 305. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.396 + 693 =
39. 39.Take 634. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 205: reverse and subtract, then reverse that answer and add. What do you get?

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