I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?

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?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?

There is a brick of gold and a brick of iron in a boat (both 10-inch blocks), if they are both dropped into the water which will make the water level higher?

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

Why do people go to bed?

There was a strange boy who was born before his father. How can this be possible?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?