How can you drop a raw egg from a height onto a concrete floor without cracking it?

Can you count the number of quadrilaterals in the picture below?

What does this say?

XLR8

Can you find a five letter word that is left with only two letters if one is removed?

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

What is the coolest letter in the alphabet?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

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?

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

A girl was sitting in her hotel room when she heard a knock on the door. She opened the door and found that a man was standing outside. The man said, "Oh! I am really sorry, I thought this was my room." He then walked through the corridor to the elevator. The girl did not know the man. She closed her door and called security asking them to apprehend the man. What made her suspicious of that man? He might have been genuinely mistaken.