1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 675 · 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 1. What is that number?
2. 2.495 + 594 =
3. 3.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 358: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 198. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 209. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.891 + 198 =
9. 9.Do the 1089 trick with 549: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 651: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.198 + 891 =
12. 12.Do the 1089 trick with 623: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 491: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.297 + 792 =
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
17. 17.Take 663. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 274. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 198: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 714. 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 2. What is that number?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
23. 23.Do the 1089 trick with 620: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 599. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 387. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
27. 27.Do the 1089 trick with 553: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 107. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
30. 30.Take 401. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 663: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 558: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.693 + 396 =
36. 36.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 153: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 915. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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