What is harder to catch the faster you run?

What do you think with the below Picture ?

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?

How can one talk without saying a single word?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

Can you find a number that lies one third of the distance between 1/3 and 2/3?

I am soft and cuddly that soothe your heart. But, If you pick my last name I am going to tear you all apart. Who am I?

Three cars are driving on a track that forms a perfect circle and is wide enough that multiple cars can pass anytime. The car that is leading in the race right now is driving at 55 MPH and the car that is trailing at the last is going at 45 MPH. The car that is in the middle is somewhere between these two speeds.
Right now, you can assume that there is a distance of x miles between the leading car and the middle car and x miles between the middle car and the last car and also, x is not equal to 0 or 1.
The cars maintain their speed till the leading car catches up with the last car and then every car stops. In this scenario, do you think of any point when the distance between any two pairs will again be x miles i.e. the pairs will be x distance apart at the same time ?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

A sundial has the fewest moving parts of any timepiece. Which has the most?