1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 457 · 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 5. What is that number?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
3. 3.Do the 1089 trick with 116: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.198 + 891 =
5. 5.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.594 + 495 =
8. 8.Take 486. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.792 + 297 =
11. 11.Do the 1089 trick with 802: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
13. 13.Take 289. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
15. 15.297 + 792 =
16. 16.Do the 1089 trick with 311: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.396 + 693 =
18. 18.693 + 396 =
19. 19.Do the 1089 trick with 309: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 914. 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 7. What is that number?
22. 22.Take 397. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
24. 24.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 997: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 298. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 177: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 853: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.891 + 198 =
32. 32.Do the 1089 trick with 653: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
34. 34.Take 653. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 982: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 194. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 750: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 846: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 158. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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