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

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

Can you make four (4) nines (9) equal 100?

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

If an electric train is travelling south, then which way is the smoke going?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

A 3 digit number is such that it's unit digit is equal to the product of the other two digits which are prime. Also, the difference between it's reverse and itself is 396.

What is the sum of the three digits?

If 1+9+8=1, what is 2+8+9?

What runs around the whole yard without moving?

In 1990, a person is 15 years old. In 1995, that same person is 10 years old. How can this be?