1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 41 · 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 946. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.297 + 792 =
3. 3.Take 117. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
5. 5.Take 922. Reverse its digits and take the smaller number away from the bigger one. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
7. 7.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.Do the 1089 trick with 234: 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 6. What is that number?
10. 10.Do the 1089 trick with 970: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.396 + 693 =
12. 12.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
13. 13.594 + 495 =
14. 14.Take 259. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Take 965. Reverse its digits and take the smaller number away from the bigger one. What do you get?
17. 17.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
18. 18.Take 490. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 518: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.693 + 396 =
21. 21.Take 409. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Take 391. Reverse its digits and take the smaller number away from the bigger one. What do you get?
23. 23.Do the 1089 trick with 912: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
25. 25.Take 800. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Take 994. Reverse its digits and take the smaller number away from the bigger one. What do you get?
27. 27.Take 658. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 981. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
30. 30.Take 910. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Take 954. Reverse its digits and take the smaller number away from the bigger one. What do you get?
32. 32.Take 297. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.495 + 594 =
35. 35.Do the 1089 trick with 980: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.Do the 1089 trick with 367: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.Take 450. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Take 661. Reverse its digits and take the smaller number away from the bigger one. What do you get?
39. 39.Take 964. Reverse its digits and take the smaller number away from the bigger one. What do you get?
40. 40.198 + 891 =

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