1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 849 · 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 368. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.198 + 891 =
3. 3.Do the 1089 trick with 784: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.396 + 693 =
5. 5.792 + 297 =
6. 6.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
9. 9.Take 721. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 801: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 330. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.594 + 495 =
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
14. 14.495 + 594 =
15. 15.297 + 792 =
16. 16.891 + 198 =
17. 17.Take 370. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
19. 19.Do the 1089 trick with 710: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
21. 21.Do the 1089 trick with 153: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
23. 23.Take 228. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
25. 25.Do the 1089 trick with 621: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Do the 1089 trick with 176: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 257. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 813. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
30. 30.Take 240. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 570. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Take 730. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 260: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 113: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 149. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 422. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.693 + 396 =
39. 39.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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