1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 501 · 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.Take 118. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
4. 4.198 + 891 =
5. 5.Do the 1089 trick with 249: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 996. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 620: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 641: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 871. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
11. 11.Do the 1089 trick with 420: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Do the 1089 trick with 288: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.297 + 792 =
14. 14.Take 800. 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 3. What is that number?
16. 16.Take 360. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.792 + 297 =
18. 18.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 410. 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 8. What is that number?
21. 21.495 + 594 =
22. 22.693 + 396 =
23. 23.Do the 1089 trick with 376: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 874: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 238: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
27. 27.Do the 1089 trick with 116: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
29. 29.Do the 1089 trick with 149: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.594 + 495 =
32. 32.Take 921. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 217: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 105. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 311: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 188. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 668: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 350: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 924. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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