Which number should replace the question mark?

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?

Why did the Girl throw the butter out of the window?

I cry without having a voice.
I fly without having wings.
I bite without having teeth.
I whisper without a mouth.

Who am I?

Imagine you are in a room with no windows or doors. How will you get out?

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

Why do you find that most of the buildings are deprived of the 13th floor?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

What is the next shape from answers A, B, C, and D figure?

Replace the question mark with the correct number.