1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 819 · 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 970. 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 5. What is that number?
3. 3.Take 710. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 812: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 496: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
8. 8.Take 420. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.792 + 297 =
10. 10.Do the 1089 trick with 347: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.693 + 396 =
12. 12.Take 449. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Do the 1089 trick with 315: reverse and subtract, then reverse that answer and add. What do you get?
14. 14.Do the 1089 trick with 890: 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 1. What is that number?
16. 16.Do the 1089 trick with 974: 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 2. What is that number?
18. 18.Do the 1089 trick with 527: 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 3. What is that number?
20. 20.Do the 1089 trick with 690: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.396 + 693 =
22. 22.Take 458. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 207: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 946: 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 4. What is that number?
26. 26.Do the 1089 trick with 109: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.495 + 594 =
29. 29.Take 913. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 734: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 832: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 750: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.891 + 198 =
34. 34.198 + 891 =
35. 35.Do the 1089 trick with 793: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 740: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 509. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 962. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 153. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 137. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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