1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 164 · 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 4. What is that number?
2. 2.Take 118. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
4. 4.Take 298. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 149. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
7. 7.Do the 1089 trick with 115: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Take 987. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Take 661. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.891 + 198 =
11. 11.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.396 + 693 =
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
15. 15.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
16. 16.Take 597. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 412: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Do the 1089 trick with 600: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Take 468. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 189. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 380. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 940. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Take 300. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 764. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 680: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 740: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 123. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
31. 31.297 + 792 =
32. 32.Take 268. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 610: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 311: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.198 + 891 =
36. 36.594 + 495 =
37. 37.Take 289. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 914. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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