1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 242 · 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 146. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
6. 6.594 + 495 =
7. 7.Take 462. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.Do the 1089 trick with 179: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
10. 10.Take 542. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.Take 851. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.Take 238. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 915. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 790: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 843: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 368. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.495 + 594 =
19. 19.Do the 1089 trick with 305: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 610: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.Do the 1089 trick with 197: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
24. 24.Do the 1089 trick with 826: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.396 + 693 =
26. 26.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Do the 1089 trick with 917: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 821: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Take 631. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 590. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.891 + 198 =
32. 32.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
34. 34.Do the 1089 trick with 993: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Take 740. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Do the 1089 trick with 934: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 244. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.198 + 891 =
39. 39.297 + 792 =
40. 40.Take 279. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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