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

There is so small cabin inside a deep forest.
All the forest burned out to worst possible but the inside of the cabin is still the same.
However all the person inside the cabin die.

How come ?

Find the next number in the series below

21 32 54 87 131 ?

You need to move three matchsticks to form three squares. Can you do it?

Complete the series by replacing "?" with the correct number.

ST ND RD TH '?'

Can you count the number of triangles in the given figure?

On a bus, there is a 26-year-old pregnant lady.
A 30-year-old policeman.
A 52-year-old random woman.
And the 65-year-old driver.

Who is the youngest?

I have two coins.
* One of the coins is a faulty coin having a tail on both sides of it.
* The other coin is a perfect coin (heads on side and tail on other).

I blindfold myself and pick a coin and put the coin on the table. The face of the coin towards the sky is the tail.

What is the probability that another side is also tail?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

It's a protector.
It sits on a bridge.
One individual can see directly through it, while others wonder what it hides.

What is it?