What is full of holes but still holds water?

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?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

What is the largest number you can write with just 3 digits?

Find a 9-digit number, which you will gradually round off starting with units, then tenth, hundred etc., until you get to the last numeral, which you do not round off. The rounding alternates (up, down, up ...). After rounding off 8 times, the final number is 500000000. The original number is commensurable by 6 and 7, all the numbers from 1 to 9 are used, and after rounding four times the sum of the not rounded numerals equals 24.

You are driving down the road in your car on a wild, stormy night, when you pass by a bus stop and you see three people waiting for the bus

An old lady looks as if she is about to die.
An old friend who once saved your life.
The perfect partner you have been dreaming about.
Knowing that there can only be one passenger in your car, whom would you choose?

What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag