An infinite number of mathematicians are standing behind a bar. The first asks the barman for half a pint of beer, the second for a quarter pint, the third an eighth, and so on. How many pints of beer will the barman need to fulfill all mathematicians' wishes?

What is the riddle which can be asked all day with a different correct answer each time.

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

Can you name an animal whose killing cannot be performed without spilling your own blood?

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

There are three houses in a straight row. One is red, one is blue, and one is white. The red house is left of the middle. The blue house is right of the middle. Where's the white house?

How many triangles can you find in this given picture?

Why do Chinese men eat more rice than Japanese men do ?

There was a man he lives in a hotel each morning he presses the first floor button each evening if there is a person in the elevator he asks him to press the 10 floor button if there is no one in the elevator he takes the stairs why.

Can you find the six hidden animals in the picture below?