1089 Trick Worksheet

Maths tricks trick 7: The 1089 magic trick · Set 563 · 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. 1.693 + 396 =
2. 2.Do the 1089 trick with 711: reverse and subtract, then reverse that answer and add. What do you get?
3. 3.Take 650. Reverse its digits and take the smaller number away from the bigger one. What do you get?
4. 4.Do the 1089 trick with 419: reverse and subtract, then reverse that answer and add. What do you get?
5. 5.In the 1089 trick, the subtraction gave a 3-digit number that starts with 1. What is that number?
6. 6.Take 670. Reverse its digits and take the smaller number away from the bigger one. What do you get?
7. 7.In the 1089 trick, the subtraction gave a 3-digit number that starts with 5. What is that number?
8. 8.792 + 297 =
9. 9.Take 217. Reverse its digits and take the smaller number away from the bigger one. What do you get?
10. 10.Do the 1089 trick with 678: reverse and subtract, then reverse that answer and add. What do you get?
11. 11.Do the 1089 trick with 641: reverse and subtract, then reverse that answer and add. What do you get?
12. 12.Take 981. Reverse its digits and take the smaller number away from the bigger one. What do you get?
13. 13.Take 337. Reverse its digits and take the smaller number away from the bigger one. What do you get?
14. 14.Take 854. Reverse its digits and take the smaller number away from the bigger one. What do you get?
15. 15.Do the 1089 trick with 341: reverse and subtract, then reverse that answer and add. What do you get?
16. 16.Do the 1089 trick with 187: reverse and subtract, then reverse that answer and add. What do you get?
17. 17.891 + 198 =
18. 18.In the 1089 trick, the subtraction gave a 3-digit number that starts with 2. What is that number?
19. 19.In the 1089 trick, the subtraction gave a 3-digit number that starts with 3. What is that number?
20. 20.Take 970. Reverse its digits and take the smaller number away from the bigger one. What do you get?
21. 21.Take 238. Reverse its digits and take the smaller number away from the bigger one. What do you get?
22. 22.Do the 1089 trick with 328: reverse and subtract, then reverse that answer and add. What do you get?
23. 23.Do the 1089 trick with 971: reverse and subtract, then reverse that answer and add. What do you get?
24. 24.Do the 1089 trick with 306: reverse and subtract, then reverse that answer and add. What do you get?
25. 25.396 + 693 =
26. 26.In the 1089 trick, the subtraction gave a 3-digit number that starts with 4. What is that number?
27. 27.In the 1089 trick, the subtraction gave a 3-digit number that starts with 6. What is that number?
28. 28.Take 359. Reverse its digits and take the smaller number away from the bigger one. What do you get?
29. 29.Take 689. Reverse its digits and take the smaller number away from the bigger one. What do you get?
30. 30.Do the 1089 trick with 247: reverse and subtract, then reverse that answer and add. What do you get?
31. 31.Do the 1089 trick with 339: 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 7. What is that number?
33. 33.297 + 792 =
34. 34.In the 1089 trick, the subtraction gave a 3-digit number that starts with 8. What is that number?
35. 35.Take 882. Reverse its digits and take the smaller number away from the bigger one. What do you get?
36. 36.Take 971. Reverse its digits and take the smaller number away from the bigger one. What do you get?
37. 37.Take 167. Reverse its digits and take the smaller number away from the bigger one. What do you get?
38. 38.Do the 1089 trick with 410: reverse and subtract, then reverse that answer and add. What do you get?
39. 39.Do the 1089 trick with 880: reverse and subtract, then reverse that answer and add. What do you get?
40. 40.Take 943. Reverse its digits and take the smaller number away from the bigger one. What do you get?

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