What is more useful when it is broken?

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?

Can it be possible to build a house that has all its four walls facing towards the South?

There is one thing that goes round the house and also inside the house but never even share a brief touch. What is it?

A boy was driving a car, a girl took a lift from her. She asked his name. The boy said - my name is hidden in my car’s number, find it if you can. After this, she got down Car number was [ WV733N ] Can you guess the name now?

Name one eight-letter word with 'kst' in the middle, 'in' the beginning, 'and' at the end.?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

If you were to put a coin into an empty bottle and then insert a cork into the neck, how could you remove the coin without taking out the cork or breaking the bottle?

Which tank will fill first?

Find out the missing number in the picture attached: