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

A man desired to get into his work building, however he had forgotten his code.
However, he did recollect five pieces of information
* Fifth number + Third number = 14
* The fourth number is one more than the second number.
* The first number is one less than twice the second number.
* The second number and the third number equals 10.
* The sum of all five numbers is 30.

What is the code ?

When I asked a girl's name she told me her name is the date '07/09/2001'.

I thought for a few seconds and then I got her name. Do you?

Consider this: Arnold Schwarzenegger has a big one. Michael J. Fox has a small one. Prince doesn’t have one. The Pope has one but never uses it. Bill Clinton has one and uses it all the time. What is it?

What has a ring but no finger?

I have eight fingers and two thumbs but I do not live. What Am I?

Can you count the number of triangles in the given picture?

I am a type of word that is spelt incorrectly or used differently, on purpose for humour. What am I?
Hint 1: You can find me in a joke.
Hint 2: I am a play on words.

1 + 9 + 8 = ?
considering, 28 + 8 + 92 = 10

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