What is the coolest letter in the alphabet?

Can you fill the blank with the correct number?

6 30 870 756030 _____

Analyze and find the missing item in the sequence:
16, 06, 68, 88, __, 98

Why are all black people so quick ?

What does a man do only once in his lifetime, but women do once a year after they are 29?

Move three sticks of the spiral below to form a square.

In the picture, you can see a chess board. On the top left position, the K marks a knight. Now, can you move the knight in a manner that after 63 moves, the knight has been placed at all the squares exactly once excluding the starting square?

Begin with a word, five letters to my name,
Remove the first and last but I am the same
Take out my middle and still, I remain.
What word am I?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?

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.