1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 823 · 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 431. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 876. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. 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.Do the 1089 trick with 197: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 947. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 500. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 311. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 916: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 800: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 258. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 970: 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 4. What is that number?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
15. 15.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.396 + 693 =
17. 17.495 + 594 =
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
19. 19.Take 240. 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 5. What is that number?
21. 21.Do the 1089 trick with 783: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 531. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 977: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
26. 26.Do the 1089 trick with 551: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 965. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.594 + 495 =
29. 29.891 + 198 =
30. 30.Do the 1089 trick with 492: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 735: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 430. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 220. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 683. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 972. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 873: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 277. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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