1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 710 · 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. 1.495 + 594 =
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
3. 3.396 + 693 =
4. 4.Do the 1089 trick with 951: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 179. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 770: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
9. 9.Do the 1089 trick with 320: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 268. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 496. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 108. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 721: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 355. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
19. 19.Take 903. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 331. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 795. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.891 + 198 =
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
24. 24.Do the 1089 trick with 176: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 799. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.594 + 495 =
27. 27.Take 186. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 245: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 248. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
31. 31.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 864: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.792 + 297 =
34. 34.Take 721. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 446. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 371: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
39. 39.Do the 1089 trick with 903: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 853. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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