1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 98 · 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
2. 2.Do the 1089 trick with 127: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.297 + 792 =
4. 4.495 + 594 =
5. 5.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 845. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.693 + 396 =
8. 8.Take 227. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 462: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 492. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
12. 12.Take 119. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 116. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.396 + 693 =
15. 15.Take 570. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 964. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 931: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
20. 20.Do the 1089 trick with 940: 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 2. What is that number?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
23. 23.Take 863. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 431. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 123. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 618. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 924: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 965. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.792 + 297 =
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
33. 33.Take 226. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 335: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 107. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 963: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 418. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 195. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.198 + 891 =
40. 40.Take 760. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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