Why Aeroplane windows are round?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

A woman lives in a Tall building thirty-six floors high and served by several elevators which stop at each floor going up and down. Each morning she leaves her apartment and goes to one of the elevators. Whichever one she takes is three times more likely to be going up than down. Why?

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

Count the number of lines in the image below ?

A prisoner is told: "If you tell a lie, we will hang you and if you tell the truth, we will shoot you." What did the prisoner say to save himself?

Why 1729 is a magic number? Answer Logically.

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

What is the next number in this series?

4,12,84,3612....

What does this rebus means ?