1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 377 · 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 4. What is that number?
2. 2.Take 886. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 470: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 976. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 176. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 715. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 287. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
10. 10.Do the 1089 trick with 986: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
12. 12.891 + 198 =
13. 13.Do the 1089 trick with 548: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 712: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.792 + 297 =
16. 16.Take 512. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 775. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
21. 21.Do the 1089 trick with 750: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 851. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 790. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 841: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 167: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 520. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.693 + 396 =
28. 28.Do the 1089 trick with 340: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
30. 30.Take 305. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.594 + 495 =
32. 32.Do the 1089 trick with 901: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 684. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 775: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
38. 38.Do the 1089 trick with 924: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.198 + 891 =
40. 40.Do the 1089 trick with 218: reverse and subtract, then reverse that answer and add. What do you get?

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