1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 448 · 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. 1.792 + 297 =
2. 2.Take 882. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.495 + 594 =
4. 4.198 + 891 =
5. 5.Take 610. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.891 + 198 =
7. 7.Do the 1089 trick with 941: 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 5. What is that number?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
10. 10.Do the 1089 trick with 306: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 123: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 864. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 113: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 530: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 690: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
18. 18.Take 963. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 218. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 450. 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 3. What is that number?
22. 22.Do the 1089 trick with 209: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 860: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 159. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 861. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 660. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 482: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.396 + 693 =
29. 29.Do the 1089 trick with 199: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 193. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
32. 32.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 336: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 194: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
37. 37.Take 558. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.297 + 792 =
39. 39.Take 169. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 912: reverse and subtract, then reverse that answer and add. What do you get?

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