How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

I have two coins.
* One of the coins is a faulty coin having a tail on both sides of it.
* The other coin is a perfect coin (heads on side and tail on other).

I blindfold myself and pick a coin and put the coin on the table. The face of the coin towards the sky is the tail.

What is the probability that another side is also tail?

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

I can write cow in 13 letters.

Can You?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

What brings you down but never up?

What has 13 hearts but no other organs?

What begins with T, ends with T, and has T in it?

The Little ant seems to be always confused. Do you know why?

I travel all around the world but always stay in the corner. What am I?