What brings you down but never up?

There's one "sport" in which neither the spectators nor the participants know the score or the leader until the contest ends.

What is it?

What is the next number in this series?

4,12,84,3612....

There was a competition where the contestants had to hold something. At the end of the event, the winner was a person who had no hands or feet. What was it that the contestants had to hold?

Can you find out the number that should replace the question mark with a valid reason?

I guess 76.8% of readers will like this riddle.

What's the least number of people should read this post?

There was a strange boy who was born before his father. How can this be possible?

Can you count the number of squares in the figure below?

Why despite killing dozens of people Charley and Wilma were not punished?

The following sentence is false. The preceding sentence is true.
Are these two sentences true or false?