1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 412 · 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. 1.198 + 891 =
2. 2.Take 285. Reverse its digits and take the smaller number away from the bigger one. What do you get?
3. 3.Do the 1089 trick with 346: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
5. 5.Do the 1089 trick with 993: reverse and subtract, then reverse that answer and add. What do you get?
6. 6.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
8. 8.495 + 594 =
9. 9.297 + 792 =
10. 10.Take 238. Reverse its digits and take the smaller number away from the bigger one. What do you get?
11. 11.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
12. 12.Do the 1089 trick with 450: reverse and subtract, then reverse that answer and add. What do you get?
13. 13.693 + 396 =
14. 14.Take 630. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 950: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 630: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.Take 159. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.Take 812. Reverse its digits and take the smaller number away from the bigger one. What do you get?
19. 19.Do the 1089 trick with 940: reverse and subtract, then reverse that answer and add. What do you get?
20. 20.Take 169. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Do the 1089 trick with 822: reverse and subtract, then reverse that answer and add. What do you get?
22. 22.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
23. 23.Take 217. Reverse its digits and take the smaller number away from the bigger one. What do you get?
24. 24.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.Do the 1089 trick with 892: reverse and subtract, then reverse that answer and add. What do you get?
26. 26.792 + 297 =
27. 27.Take 960. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 802. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 200. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 200: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Take 691. Reverse its digits and take the smaller number away from the bigger one. What do you get?
33. 33.Do the 1089 trick with 310: reverse and subtract, then reverse that answer and add. What do you get?
34. 34.Do the 1089 trick with 765: reverse and subtract, then reverse that answer and add. What do you get?
35. 35.Do the 1089 trick with 681: reverse and subtract, then reverse that answer and add. What do you get?
36. 36.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
37. 37.Do the 1089 trick with 920: 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 6. What is that number?
39. 39.Do the 1089 trick with 654: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Do the 1089 trick with 390: reverse and subtract, then reverse that answer and add. What do you get?

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