1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 283 · 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. 1.891 + 198 =
2. 2.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
4. 4.Take 624. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Do the 1089 trick with 709: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 209: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 175: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.693 + 396 =
9. 9.594 + 495 =
10. 10.297 + 792 =
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
12. 12.Take 651. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 792. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.792 + 297 =
15. 15.Take 832. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 581: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
18. 18.Do the 1089 trick with 420: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 684: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 104: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 729: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 355: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.396 + 693 =
25. 25.Do the 1089 trick with 239: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 682: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 502: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.198 + 891 =
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
31. 31.Take 148. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 650. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 174. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 693. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
36. 36.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 714. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 439: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?

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