1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 854 · 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 823. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 784: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.495 + 594 =
4. 4.396 + 693 =
5. 5.Take 931. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 561: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.198 + 891 =
9. 9.Do the 1089 trick with 701: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 961. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 187. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.297 + 792 =
13. 13.Do the 1089 trick with 722: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 835. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
18. 18.Take 783. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 204. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 840. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Take 330. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 912. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
28. 28.693 + 396 =
29. 29.Take 321. 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 6. What is that number?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
33. 33.Take 775. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 137. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.Take 659. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 127: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
38. 38.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 270. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.792 + 297 =

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