1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 113 · 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. 1.891 + 198 =
2. 2.Take 861. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 228: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.Take 620. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.Do the 1089 trick with 815: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 780: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
9. 9.Take 320. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 715: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
12. 12.Take 650. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 963. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Do the 1089 trick with 956: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Do the 1089 trick with 752: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Take 410. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.Take 900. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 651. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.396 + 693 =
20. 20.Do the 1089 trick with 602: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 652: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Take 287. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.792 + 297 =
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
25. 25.Take 835. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 429: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 920. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Do the 1089 trick with 922: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.297 + 792 =
30. 30.Take 780. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.198 + 891 =
33. 33.Take 442. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Do the 1089 trick with 367: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
36. 36.Do the 1089 trick with 219: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Do the 1089 trick with 920: reverse and subtract, then reverse that answer and add. What do you get?
38. 38.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Do the 1089 trick with 183: reverse and subtract, then reverse that answer and add. What do you get?

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