1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 14 · 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 6. What is that number?
2. 2.594 + 495 =
3. 3.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Do the 1089 trick with 931: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.693 + 396 =
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
8. 8.Take 911. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.792 + 297 =
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
13. 13.Take 490. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 229. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.297 + 792 =
17. 17.Take 792. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 210. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 700. 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 3. What is that number?
21. 21.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 760: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.495 + 594 =
24. 24.Do the 1089 trick with 914: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 119: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 825: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 915: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 591: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
31. 31.Take 621. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 128. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 135. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.198 + 891 =
35. 35.891 + 198 =
36. 36.Do the 1089 trick with 813: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 914. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 833. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 255: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 249. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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