1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 367 · 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 842. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 510: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 430: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.396 + 693 =
5. 5.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. 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.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 900: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.495 + 594 =
10. 10.Do the 1089 trick with 158: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 416. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
14. 14.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
15. 15.594 + 495 =
16. 16.Take 420. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 701. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 851. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.297 + 792 =
20. 20.198 + 891 =
21. 21.Take 391. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
23. 23.891 + 198 =
24. 24.Do the 1089 trick with 995: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Take 527. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 247. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 971: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.792 + 297 =
31. 31.Do the 1089 trick with 791: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 600. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 385: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 335: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
37. 37.Take 763. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
39. 39.Take 642. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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