1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 649 · 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 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
3. 3.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 154: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 501. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Take 234. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 136: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
11. 11.Take 489. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 301: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 650. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 402. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 176. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 814: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Do the 1089 trick with 892: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 672: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 531. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.594 + 495 =
21. 21.198 + 891 =
22. 22.Take 760. 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 7. What is that number?
24. 24.Take 220. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 114. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 794. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 862. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 721: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
32. 32.Take 956. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.297 + 792 =
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
35. 35.Do the 1089 trick with 954: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 569. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 902. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.891 + 198 =
40. 40.Take 125. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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