Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

A B C D E F G H

These are the letters given to you. Now you have to find out the letter that comes two to the right of the letter which is immediately to the left of the letter that comes three to the right of the letter that comes midway between the letter two to the left of the letter C and the letter immediately to the right of the letter F.

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

What is Luis Suarez's (Soccer Player) favorite tea?

A chess tournament is taking place on knock-out terms (the one who loses the match is out of the game).
(a) If 10 matches are played in total, how many players participated?
(b) If 20 players took part in the tournament, how many matches were played?

How can you make number one disappear by adding something to it?

Solve below popular number sequence
314 159 265 358 979 323 846 ?

Who is that with a neck and no head, two arms and no hands? What is it?

What can you catch but never throw?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?