1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 669 · 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 236. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Take 957. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.792 + 297 =
4. 4.Do the 1089 trick with 952: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 260. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.693 + 396 =
7. 7.198 + 891 =
8. 8.Do the 1089 trick with 478: 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. 10.396 + 693 =
11. 11.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 385. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 361: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 401: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
16. 16.Do the 1089 trick with 356: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
18. 18.Take 693. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 844: 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 7. What is that number?
22. 22.Do the 1089 trick with 643: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 194: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
26. 26.Take 701. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
28. 28.Do the 1089 trick with 795: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 911: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 811: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 189: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 321. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 502. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 963: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 532: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.297 + 792 =
37. 37.Do the 1089 trick with 841: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 139. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 401. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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