1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 142 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
3. 3.Take 891. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 259: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.198 + 891 =
7. 7.Take 153. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
11. 11.Do the 1089 trick with 740: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 881: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 113: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 127. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 300. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.594 + 495 =
18. 18.Take 149. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 452: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 933. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 459. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 148. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 185. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 840. 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 7. What is that number?
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 970: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 893: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.297 + 792 =
31. 31.Take 306. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 326. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
34. 34.Do the 1089 trick with 118: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 118. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 351. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 377. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 551: reverse and subtract, then reverse that answer and add. What do you get?

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