[PmbPhy]

Question 1. If you take the number 10, which is essentially a whole number, and divide it by 3 you get three equal figures of 3.3333 recurring. How is this the case in that a completely whole number becomes 3 infinite numbers? I.e. 3.333 recurring never reaches an end therefore cannot form a whole.

As explained above 3.333... is an infinite series whose sum is 10/3. What this means is that 10/3 is the number which the sum gets closer to as you add more digits.

Question 2 and 3 are kind of similar. I cannot comrehend that space is infinite.

If space is actually infinite then join the club.   But it's also possible that space is finite.

Everything has to have an end to it.

Not at all.

Am i right in saying the universe is made up of galaxies eyc (i may be wrong!).

Yes.

Assuming this what is outside of that universe, and if there is something, what is outside of that? An so on!

There is no outside of the universe.