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?

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?

What does a man do only once in his lifetime, but women do once a year after they are 29?

Suppose that you are trapped on the surface of a frozen lake. The surface is so smooth and ideal that there is no friction at all. You cant make any grip on the ice and no wind is blowing to help you out. You have just a mobile phone with you which has got no reception disabling you to call for help.

How will you plan your escape before you freeze to death on the frozen lake?

How many triangles are there on the puzzle below?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

What do you see in the given picture?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?