Digit Sum Magic Worksheet

Maths tricks trick 10: Digit-sum magic · Set 362 · 40 questions

The trick (Digits add to the 9 table): Add the digits you can see. Find the next number in the 9 table (9, 18, 27 …) above that total. The hidden digit is the difference. (Any number minus its digit sum is in the 9 table too.)

1. 1.Take 75 and take away the sum of its digits. What do you get?
2. 2.?215 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
3. 3.Take 76 and take away the sum of its digits. What do you get?
4. 4.?780 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
5. 5.6?77 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
6. 6.Take 64 and take away the sum of its digits. What do you get?
7. 7.44?8 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
8. 8.?47 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
9. 9.Take 54 and take away the sum of its digits. What do you get?
10. 10.61?7 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
11. 11.Take 79 and take away the sum of its digits. What do you get?
12. 12.Take 53 and take away the sum of its digits. What do you get?
13. 13.840? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
14. 14.3?00 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
15. 15.?973 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
16. 16.Take 71 and take away the sum of its digits. What do you get?
17. 17.Take 41 and take away the sum of its digits. What do you get?
18. 18.68?6 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
19. 19.8?1 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
20. 20.Take 30 and take away the sum of its digits. What do you get?
21. 21.20?3 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
22. 22.Take 31 and take away the sum of its digits. What do you get?
23. 23.693? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
24. 24.?505 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
25. 25.52?0 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
26. 26.Take 21 and take away the sum of its digits. What do you get?
27. 27.Take 32 and take away the sum of its digits. What do you get?
28. 28.?661 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
29. 29.2?80 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
30. 30.Take 91 and take away the sum of its digits. What do you get?
31. 31.3?49 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
32. 32.Take 49 and take away the sum of its digits. What do you get?
33. 33.Take 63 and take away the sum of its digits. What do you get?
34. 34.Take 67 and take away the sum of its digits. What do you get?
35. 35.Take 34 and take away the sum of its digits. What do you get?
36. 36.357? is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
37. 37.Take 66 and take away the sum of its digits. What do you get?
38. 38.?588 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
39. 39.?30 is in the 9 times table. One digit is hidden, and it is not 0. What is the hidden digit?
40. 40.Take 25 and take away the sum of its digits. What do you get?

Free maths tricks lessons, practice and worksheets at talentjr.in/maths-tricks