What does this Rebus Picture means ?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

What occurs twice in a week, once in a year but never in a day?

Can you find the hidden animal in the picture below?

What are the next two letters in the following series and why?
W A T N T L I T F S _ _

*Hint: Check Puzzle Title

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

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

What number when divided in half becomes zero?

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

Find out the number of circles in the given picture having Illusion