1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 356 · 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 116. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 895: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.891 + 198 =
4. 4.198 + 891 =
5. 5.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.792 + 297 =
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
8. 8.Do the 1089 trick with 437: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 599. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 810: 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 5. What is that number?
14. 14.594 + 495 =
15. 15.Take 146. 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 3. What is that number?
17. 17.Take 480. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 941: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 835: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 614. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 138: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 369. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 623. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 927: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.396 + 693 =
27. 27.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.495 + 594 =
29. 29.Take 416. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.297 + 792 =
32. 32.Do the 1089 trick with 118: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 840. 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
36. 36.Do the 1089 trick with 338: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 188. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 922: reverse and subtract, then reverse that answer and add. What do you get?

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