1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 681 · 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 127. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 386: reverse and subtract, then reverse that answer and add. 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
5. 5.Do the 1089 trick with 771: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.198 + 891 =
7. 7.Take 820. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Take 519. Reverse its digits and take the smaller number away from the bigger one. What do you get?
9. 9.Do the 1089 trick with 612: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.891 + 198 =
11. 11.Take 350. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 235. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.792 + 297 =
14. 14.Take 944. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 982. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 810. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Do the 1089 trick with 299: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Take 709. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 331: 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 3. What is that number?
22. 22.693 + 396 =
23. 23.Do the 1089 trick with 208: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 288: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.297 + 792 =
26. 26.Take 208. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 367: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 914: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 123: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.396 + 693 =
32. 32.Take 882. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Take 684. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
36. 36.Take 460. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 834. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 990. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 169. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 157. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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