A man lives on the fifteenth floor of an apartment building. Every morning he takes the elevator down to the lobby and leaves the building. In the evening, he gets into the elevator, and, if there is someone else in the elevator, or if it was raining that day, he goes back to his floor directly. Otherwise, he goes to the tenth floor and walks up five flights of stairs to his apartment. Can you explain why he does this?

You are a prisoner sentenced to death. The Emperor offers you a chance to live by playing a simple game. He gives you 50 black marbles, 50 white marbles, and 2 empty bowls. He then says, 'Divide these 100 marbles into these 2 bowls. You can divide them any way you like as long as you use all the marbles. Then I will blindfold you and mix the bowls around. You then can choose one bowl and remove ONE marble. If the marble is WHITE you will live, but if the marble is BLACK... you will die.'

How do you divide the marbles up so that you have the greatest probability of choosing a WHITE marble?

Can you calculate the probability of getting a sum of six when a dice is thrown twice?

Can you guess the name of the month by looking the below rebus ?

Find the number of squares in the below-given picture.

John was piloting a plane behind a car but was never able to overtake it. Why?

What is the fastest way to double your money?

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

What is black when you buy it, red when you use it, and gray when you throw it away?

I am the fastest animal but cannot climb the tree. What am I?