What is so fragile that saying its name breaks it?

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

A train full of passengers goes through a tunnel. When the train comes out from the other end, there is no single person on the train.

How did it happen?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

James bond was pushed out of an aeroplane without any parachute.
He survived, How come?

A boy was locked in a room by some robbers. All that is in the room is a piano, a calendar, and a bed. The room is locked from the outside. What does he eat, drink, and how does he escape and get out?

There was a minor accident with a doctor's son but the doctor noticed no major injury. After the treatment, the father of that doctors son is sitting with the son of the doctor without the doctor being in the room.

How can this be possible?

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

In the given figure, you can see that four match sticks are used to form a square. Can you form five squares by using six matches?

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?