If you say my name, I will no longer exist. What am I?

I can write cow in 13 letters.

Can You?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

A boy was driving a car, a girl took a lift from her. She asked his name. The boy said - my name is hidden in my car’s number, find it if you can. After this, she got down Car number was [ WV733N ] Can you guess the name now?

The first person saw the bridge step on it and crossed,
the second person saw the bridge did not step on it but crossed,
the third person did not see the bridge did not step on it but crossed.
Who are these people?

In the picture given below, can you find out which digit will take place of the question mark?

Solve the equation in the image by looking at the pattern closely.

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

By moving exactly three matchsticks can you make the below equation true.It can be solved by 3 ways.

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