1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 735 · 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. 1.693 + 396 =
2. 2.297 + 792 =
3. 3.Take 693. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.594 + 495 =
5. 5.396 + 693 =
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
7. 7.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 730: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
10. 10.Do the 1089 trick with 457: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 630: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 842: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 491: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 954: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 623: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
22. 22.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 779: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 380. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 316. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 167. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 940. 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 7. What is that number?
30. 30.Take 901. 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 1. What is that number?
32. 32.Take 325. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 481. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 946: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 446. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 461. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 225. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 220. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
40. 40.792 + 297 =

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