With the help clues provided in the image, can you find the 5 digit key?

If eleven plus two equals one, what does nine plus five equal?

What do you answer even though it never asks you questions?

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

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?

Can you count the number of seconds in a year?

Clue: You need to bother about calculation.

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?

Take number 1000 and then add 20 to it.
Now add 1000 one more time.
Now add 30.
Now add 1000 one more time.
Now add 40.
Now add 1000 one more time.
Now add 10.

What is the total?