1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 534 · 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 8. What is that number?
2. 2.Do the 1089 trick with 432: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
5. 5.891 + 198 =
6. 6.Do the 1089 trick with 773: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 892: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 624. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 652: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
12. 12.Do the 1089 trick with 852: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
15. 15.792 + 297 =
16. 16.Take 289. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 680. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 513. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 551. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.495 + 594 =
21. 21.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.594 + 495 =
23. 23.Do the 1089 trick with 751: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 844. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 254. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 418. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 610: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 761: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 420. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 964. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 348. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 713: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.297 + 792 =
36. 36.Do the 1089 trick with 168: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
38. 38.Take 395. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.198 + 891 =
40. 40.Take 198. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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