1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 311 · 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. 2.693 + 396 =
3. 3.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. 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.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
7. 7.Do the 1089 trick with 300: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 194: reverse and subtract, then reverse that answer and add. What do you get?
9. 9.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Take 569. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.396 + 693 =
12. 12.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
14. 14.Do the 1089 trick with 700: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 210. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.198 + 891 =
17. 17.Do the 1089 trick with 781: reverse and subtract, then reverse that answer and add. What do you get?
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
19. 19.Take 470. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Take 301. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 408. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 381. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 660: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.792 + 297 =
25. 25.594 + 495 =
26. 26.Do the 1089 trick with 610: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Take 993. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 550. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.495 + 594 =
30. 30.297 + 792 =
31. 31.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
32. 32.Do the 1089 trick with 513: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Do the 1089 trick with 930: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 501: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Take 200. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Do the 1089 trick with 114: reverse and subtract, then reverse that answer and add. 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 774. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.Take 642. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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