Can you find a number that lies one third of the distance between 1/3 and 2/3?

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

How can this be possible?

What has one eye, but can’t see?

Next Number in the Series,

5, 16, 49, 104, ?

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

I shave every day, but my beard stays the same. What am I?

What has many teeth, but cannot bite?

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

How many times can you subtract the number two from the number fifty?

I am the first thing you need while camping.
I am always with the person named Marcos Valencia and Carrick.
But Pogba Zlatan and Rooney think I am wasteful and do not need me.
I am the second to the last thing to add when you are making a patch.

What am I?