If it took eight men ten hours to build a wall, how long would it take four men to build it?

Replace the question mark with the correct number in the below-given picture?

Open a Laptop which is password protected. Hint for the password is given as below:

1 mobile 3 books 2 Boards 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches

Who is generally closer to the kids, mom or dad?

(it's a funny riddle)

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

Find the next number in the series below

21 32 54 87 131 ?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

By using all numbers, i.e. 123456789 and subtraction/addition, operators number 100 can be formed in many ways.
Example: 98 + 7 + 6 - 5 - 4 - 3 + 2 - 1 = 100

But if we add a condition use of the number 32 is a must. Then there are limited solutions.
One of such solution is: 9 - 8 + 76 + 54 - 32 + 1 = 100

Can you tell me any other solution?