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 shave every day, but my beard stays the same. What am I?

Why are all black people so quick ?

What is the centre of gravity?

What has one letter and starts with an E?

A bomb exploded in a room full of married couples and no one died. How?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

In a science lab, a petri dish hosts a healthy colony of yeast for an experiment. Now every minute, all the yeast cells divide into two. At noon, there was just a single cell of yeast and at 1:22, the Petri dish was half full. Can you calculate when the dish will be full of yeast?

What does does this rebus picture means ?

why number 8549176320 is one of a kind?