Why is it very easy to weigh a fish?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

I possess a head

I flaunt a tail

But I don't have mouth or legs

Can you find out who I am?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?

You are given 2 eggs.
You have access to a 100-storey building.
Eggs can be very hard or very fragile means it may break if dropped from the first floor or may not even break if dropped from 100th floor, Both eggs are identical.
You need to figure out the highest floor of a 100-storey building an egg can be dropped without breaking.
Now the question is how many drops you need to make. You are allowed to break 2 eggs in the process

People put me on the table and cut me but do not eat me. What am I?

How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

A thief enters a store and threatens the clerk, forcing her to open the safe. The clerk says, “The code for the safe is different every day, and if you hurt me you’ll never get the code.” But the thief manages to guess the code on his own. How did he do it?