Accidentally, two trains are running in the opposite direction and enter a tunnel that is 200 miles long. A supersonic bird that has fled the lab and taken shelter in the tunnel starts flying from one train towards the other at a speed of 1000 mph. As soon as it reaches the second train, he starts flying back to avoid collision and meets the first train again at the other end. The bird keeps flying to and fro till the trains collide with each other.

What is the total distance that the supersonic bird has traveled till the trains collided?

You throw me out when you want to use me and you take me in when you don't want to use me.

Who Am I?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

In the picture given below, can you find out which digit will take place of the question mark?

Which city is three-fifths chick two third cat and 50% goat?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

What can you hold in your right hand, but never in your left hand?

I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

What Adam and Eve do not have but the rest of the people have?