What goes up but never comes down?

Who has married many women but was never married?

I never was there, I am always to be.
You have never ever seen me, not ever you will.
Yet I am the confidence of everyone.

Who Am I?

What is so fragile that saying its name breaks it?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

The teacher told the student that if he told a lie then he will be expelled from school and if he told the truth then he still is expelled from school.

What can a student say to prevent his being expelled from school?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

The captain of a ship is telling you an interesting story and then poses a question. He says, “I have travelled the oceans far and wide. 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. Can you tell me how that was possible?”