They do not possess flesh or feathers or scales or bone
But still, they are blessed with fingers and thumbs of their own.

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

A famous swimmer can swim downstream in a lake in exactly 40 minutes with the lake current.
He can swim upstream in that lake in exactly 60 minutes against the lake current.
The length of the lake is 2 km.

How long he can cover the distance of one side at a still lake with no current?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

Can you move 2 matchsticks to form four equal sized squares.

What can go through glass without breaking it?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

Until it is measured, not known. Yet how you miss it when it has gone. What is it?

A person is found murdered in his Chamber. When the crime scene is investigated, the Investigator find out that there is a calendar on which the victim has written a few numbers with his blood. The numbers are 4, 11, 11 and 4.

There are four suspects in the murder, John, Jacob, Anna and Lee. Can you find out who is the murderer?

Solve this tricky question. You are trapped in a forest. With you, you have a gun preloaded with two bullets in it. In front of you, there is a tiger, a leopard and a jaguar.

How do you survive?