1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 543 · 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 974. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 158. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.594 + 495 =
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
5. 5.Do the 1089 trick with 346: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Take 329. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
8. 8.792 + 297 =
9. 9.Do the 1089 trick with 700: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 306. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Do the 1089 trick with 971: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
13. 13.Do the 1089 trick with 951: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.198 + 891 =
15. 15.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.297 + 792 =
17. 17.396 + 693 =
18. 18.495 + 594 =
19. 19.Take 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
22. 22.Do the 1089 trick with 149: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 289. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 875. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 578. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 802: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 196. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 411: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 380: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 702: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 991: 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 2. What is that number?
36. 36.Do the 1089 trick with 851: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.891 + 198 =
38. 38.Take 981. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 351. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?

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