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

Find the 8 in the below-given Image.

Two friends decide to get together; so they start riding bikes towards each other. They plan to meet halfway. Each is riding at 6 MPH. They live 36 miles apart. One of them has a pet carrier pigeon and it starts flying the instant the friends start traveling. The pigeon flies back and forth at 18 MPH between the 2 friends until the friends meet.

How many miles does the pigeon travel?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

I look at you, you look at me, I raise my right, you raise your left. What am I?

John was drowned by he was not wet. How?

Can you find the missing number in the third row?
35 20 14
27 12 18
5 2 ?

How many points are there on the globe where, by walking one mile south, then one mile east and then one mile north, you would reach the place where you started?