using four eights (8) and a one (1) and one mathematical symbol , create the number 100

Astrology starts with the alphabet A, Biology starts with B, Psychology with P and Limnology with L.

Can you find an "ology" that begins with a P?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

Here is a conversation between a couple who both are software professionals.

Husband: Hey! What is your date of birth?
Wife Replied Angrily: It is 591062400
Husband after doing some calculations replied, "Got It".

What is the DOB of the wife?

Which is the smallest number that you can write using all the vowels exactly once?

What Deficiency does the below rebus represent?

VIT_MIN

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

While going to your grandmother's house, you counted Twenty houses on the right side. While returning back to your home, you counted Twenty houses on the left side.

How many houses are there between your home and your grandmother's home?

Bopanna was working on a murder case when he received a message about the location of the murder weapon.
The message was encrypted as below.

"deb mitciv eht edisni neddih si nopaew redrum ehT"

Tell me the location of the murder weapon.