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

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

One fine day, an intellectual man came to the emperor's court with the aim of testing Birbal's wittiness. In order to do this, he challenged Birbal to answer his question and hence prove that he was as intelligent and witty as he was said to be.
He asked Birbal, Do you want me to ask one difficult question or a hundred easy ones?
Since both Akbar and Birbal had had a tough day and were eager to leave, Birbal hastily told the intellectual to ask him a single difficult question.
Intellectual: OK. Tell me what came first into the world, the egg or the chicken?
Of course, the chicken, Birbal replied with a smile.
This time with a note of victory in his voice, the intellectual asked Birbal, How will you demonstrate that?
What did Birbal say?

Can you move 2 matchsticks to form four equal sized squares.

You may enter, but you may not come in. I have space, but no room. I have keys, but open no lock. What am I?

A man is found hanging dead from the ceiling of a room. The room’s dimensions are 15 x 15 x 15. The man is only 6ft tall and the rope was only 2ft long. There are no windows and only one door to the room. The door is bolted shut from the inside, and a puddle of water is under the man. How did he kill himself?

There are two words one resembles the "state of rest" and the other is related to "writing/reading material".

Can you name these two words which also sound similar?

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

Solve below rebus puzzle?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?