1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 845 · 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 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 126. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
5. 5.Do the 1089 trick with 239: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 163: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 288. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.198 + 891 =
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
10. 10.792 + 297 =
11. 11.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.297 + 792 =
13. 13.Take 843. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
15. 15.Do the 1089 trick with 523: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 167. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 640. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.495 + 594 =
19. 19.Do the 1089 trick with 674: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 917. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
24. 24.Take 447. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Do the 1089 trick with 841: 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 7. What is that number?
27. 27.Take 761. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 236: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 863. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 129. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 107: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 942. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 541: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.693 + 396 =
36. 36.Do the 1089 trick with 770: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 590: 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 6. What is that number?
39. 39.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 721. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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