1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 847 · 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 149. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 194: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 126. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.693 + 396 =
5. 5.Do the 1089 trick with 370: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.Do the 1089 trick with 913: reverse and subtract, then reverse that answer and add. What do you get?
7. 7.Do the 1089 trick with 549: reverse and subtract, then reverse that answer and add. What do you get?
8. 8.792 + 297 =
9. 9.Take 973. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
11. 11.Take 266. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 942. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.594 + 495 =
14. 14.Take 945. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Take 659. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.Do the 1089 trick with 189: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 561. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Do the 1089 trick with 660: reverse and subtract, then reverse that answer and add. What do you get?
19. 19.Do the 1089 trick with 670: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Do the 1089 trick with 810: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.396 + 693 =
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
23. 23.Do the 1089 trick with 925: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Take 991. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.Take 694. Reverse its digits and take the smaller number away from the bigger one. What do you get?
26. 26.Do the 1089 trick with 321: reverse and subtract, then reverse that answer and add. What do you get?
27. 27.Do the 1089 trick with 850: reverse and subtract, then reverse that answer and add. What do you get?
28. 28.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
29. 29.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
30. 30.Do the 1089 trick with 644: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 811: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
33. 33.Take 980. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 880. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
36. 36.Take 764. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
38. 38.Do the 1089 trick with 990: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
40. 40.495 + 594 =

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