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?

If an electric train is travelling south, then which way is the smoke going?

What is the word or phrase below?
R | E | A | D

Eight of us go fourth, not back, to protect our king from an attack. What are we?

Find the value of "?" in the ball picture Riddle below:

I have teeth but i don't bite. Who Am I ?

Can you find out which number multiplied by itself will give the output as 12345678987654321?

While handling a project, the landscaper is asked by the owner of the mansion that he wants four trees in front of his mansion that are exactly equidistant from each other.

How will he do it?

A worker is to perform work for you for seven straight days. In return for his work, you will pay him 1/7th of a bar of gold per day. The worker requires a daily payment of 1/7th of the bar of gold. What and where are the fewest number of cuts to the bar of gold that will allow you to pay him 1/7th each day?

You need to complete the maze by entering from the entrance marked below in the figure near the yellow circle, bottom left and leaving from the exit point near the green circle, bottom middle.

Rule of Game: You can move only by exchanging green and yellow circles.