A man was gazing through the window of the 23rd floor of the building. He suddenly opened the window and jumped on the other side of the window. On landing on the floor, there was not a sheer mark of injury on him.

How can that be possible if he did not use any kind of parachute and did not land on a soft surface?

The dirtier I get, the whiter I look. Who am I?

Why do we preferably have round manhole covers and not square ones?

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

Can you count the number of triangles in the picture below?

Can you solve this picture maths equation?

Which is heavier: a ton of bricks or a ton of feathers?

There are three boxes on a table. One of the box contains Gold and the other two are empty. A printed message contains in each box. One of the message is true and the other two are lies.

The first box says "The Gold is not here".

The Second box says "The Gold is not here".

The Third box says "The Gold is in the Second box".

Which box has the Gold?

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

How can one talk without saying a single word?