1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 411 · 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. 1.198 + 891 =
2. 2.Do the 1089 trick with 711: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
4. 4.Do the 1089 trick with 248: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
6. 6.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.396 + 693 =
9. 9.Do the 1089 trick with 649: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 450. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
12. 12.891 + 198 =
13. 13.693 + 396 =
14. 14.Take 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 729: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 531. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 419: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
19. 19.Take 561. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
23. 23.Take 803. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 480: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
26. 26.Do the 1089 trick with 229: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 720: 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 2. What is that number?
29. 29.Take 438. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
32. 32.Take 743. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 991: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 421. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Do the 1089 trick with 700: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 368. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.297 + 792 =
40. 40.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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