1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 137 · 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.Do the 1089 trick with 129: reverse and subtract, then reverse that answer and add. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
3. 3.Do the 1089 trick with 638: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 820: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 476. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 823. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 902: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 750. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 563: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
11. 11.Take 931. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 770: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Do the 1089 trick with 369: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.891 + 198 =
15. 15.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 977: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 481. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 175. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
22. 22.Do the 1089 trick with 703: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 971: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 822: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 270: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
27. 27.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 870: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 119: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
31. 31.396 + 693 =
32. 32.Take 400. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 442. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 579: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 210. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 660. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
40. 40.297 + 792 =

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