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?

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?

Suppose we lay down two cups in front of you. One of the cups is filled with tea and the other one with coffee. Now we ask you to take a spoonful of tea and mix it with the coffee. At this moment, the coffee cup has a mixture of tea and coffee. You have to take that mixture (spoonful) and add it back to the tea.

Can you now tell if the cup of coffee has more tea or the cup of tea has more coffee?

What has many teeth, but cannot bite?

Can you find out the remainder when 3^300 is divided by 5?

Identify The phrase in the picture.

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?

Which tank will fill first?

I have Rs.50 and I spend it in the way as below.

A plane crashed between the border of Mexico and America. Where do you bury the survivors?