1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 692 · 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.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 802: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.297 + 792 =
4. 4.495 + 594 =
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
6. 6.Take 217. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 922. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 894: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
12. 12.Take 380. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 630: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 799. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 285. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 820: 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 4. What is that number?
18. 18.Take 349. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 698: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.396 + 693 =
22. 22.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.198 + 891 =
24. 24.Take 752. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 690: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.693 + 396 =
27. 27.792 + 297 =
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
29. 29.Take 199. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 530. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 567. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 316: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
36. 36.Do the 1089 trick with 210: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
39. 39.Take 663. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?

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