1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 851 · 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 930. Reverse its digits and take the smaller number away from the bigger one. What do you get?
2. 2.Do the 1089 trick with 628: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Do the 1089 trick with 872: reverse and subtract, then reverse that answer and add. What do you get?
4. 4.Take 950. Reverse its digits and take the smaller number away from the bigger one. What do you get?
5. 5.Take 270. 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 5. What is that number?
7. 7.Take 890. Reverse its digits and take the smaller number away from the bigger one. What do you get?
8. 8.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
9. 9.Do the 1089 trick with 230: reverse and subtract, then reverse that answer and add. What do you get?
10. 10.Do the 1089 trick with 421: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Take 794. Reverse its digits and take the smaller number away from the bigger one. What do you get?
12. 12.Take 127. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
14. 14.Do the 1089 trick with 720: reverse and subtract, then reverse that answer and add. What do you get?
15. 15.Take 604. Reverse its digits and take the smaller number away from the bigger one. What do you get?
16. 16.297 + 792 =
17. 17.Take 700. Reverse its digits and take the smaller number away from the bigger one. What do you get?
18. 18.198 + 891 =
19. 19.Take 702. Reverse its digits and take the smaller number away from the bigger one. What do you get?
20. 20.Do the 1089 trick with 670: reverse and subtract, then reverse that answer and add. What do you get?
21. 21.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
22. 22.594 + 495 =
23. 23.792 + 297 =
24. 24.Take 860. Reverse its digits and take the smaller number away from the bigger one. What do you get?
25. 25.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
27. 27.Take 260. Reverse its digits and take the smaller number away from the bigger one. What do you get?
28. 28.Take 588. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 236. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
31. 31.Do the 1089 trick with 840: reverse and subtract, then reverse that answer and add. What do you get?
32. 32.Do the 1089 trick with 220: reverse and subtract, then reverse that answer and add. What do you get?
33. 33.Take 429. Reverse its digits and take the smaller number away from the bigger one. What do you get?
34. 34.Take 309. Reverse its digits and take the smaller number away from the bigger one. What do you get?
35. 35.891 + 198 =
36. 36.Do the 1089 trick with 905: reverse and subtract, then reverse that answer and add. What do you get?
37. 37.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
38. 38.Do the 1089 trick with 581: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.693 + 396 =
40. 40.In the 1089 trick, the subtraction gave a 3-digit number that starts with 7. What is that number?

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