1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 438 · 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.Do the 1089 trick with 390: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
3. 3.891 + 198 =
4. 4.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
7. 7.297 + 792 =
8. 8.Take 547. Reverse its digits and take the smaller number away from the bigger one. 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. 10.693 + 396 =
11. 11.Take 905. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 149. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.792 + 297 =
14. 14.Take 836. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
16. 16.Do the 1089 trick with 803: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.198 + 891 =
18. 18.Take 954. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 107: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
21. 21.Take 734. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
23. 23.Do the 1089 trick with 912: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 669. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 579. 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 1. What is that number?
27. 27.Take 511. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 804. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 966. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 588. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 952: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 119: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 621. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 228. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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