What is wrong in the below Picture?

It is always ahead of me yet I can never see it. What is it?

What is next number in the pattern below:

131 517 192 123 ?

The first two letters signify a male, the first three letters signify a female, the first four letters signify a great, while the entire world signifies a great woman. What is the word?

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?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

The more it dries, the wetter it becomes. Can you tell what it is?

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

It can't be seen, can't be felt, can't be heard, and can't be smelt.
It lies behind stars and under hills, And empty holes it fills.
It comes first and follows after, Ends life, and kills laughter.
What is it?

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?