1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 405 · 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 670: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 237: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.792 + 297 =
5. 5.594 + 495 =
6. 6.Take 499. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.Take 308. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 580. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Take 330. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
12. 12.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 380. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 993: 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 6. What is that number?
16. 16.Take 310. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
18. 18.Do the 1089 trick with 114: 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 8. What is that number?
20. 20.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.891 + 198 =
22. 22.Take 177. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 613: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 660: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 228: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.Take 588. 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. 28.198 + 891 =
29. 29.Do the 1089 trick with 874: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Take 571. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 198. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Do the 1089 trick with 830: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 129: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
35. 35.Take 850. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 317. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 841: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Do the 1089 trick with 608: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 430: reverse and subtract, then reverse that answer and add. What do you get?

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