1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 154 · 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 7. What is that number?
2. 2.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
8. 8.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 720. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.693 + 396 =
11. 11.594 + 495 =
12. 12.396 + 693 =
13. 13.Do the 1089 trick with 638: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Take 461. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 543: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.495 + 594 =
18. 18.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 724: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 910: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 156. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.792 + 297 =
25. 25.Do the 1089 trick with 197: 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. 27.891 + 198 =
28. 28.Do the 1089 trick with 609: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 735. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 426. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 207: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 409. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 146: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 520: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 188. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.198 + 891 =
38. 38.Take 289. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 176: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 530: reverse and subtract, then reverse that answer and add. What do you get?

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