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

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?

I am white when I am dirty, and black when I am clean. What am I?

I’m tall when I’m young, and I’m short when I’m old. What am I?

What part of the chicken has the most feathers?

Can you write down eight eights so that they add up to one thousand?

The captain of a ship was telling this interesting story: "We travelled the sea far and wide. At one time, two of my sailors were standing on opposite sides of the ship. One was looking west and the other one east. And at the same time, they could see each other clearly." How can that be possible?

what does this picture(rebus) riddle means ?