If you are counting balconies, then no.
If there is something pertaining to a balcony like its width then you would use an apostrophe straight after balcony without an ies ending.
E.g. There are four balconies on that building and the top balcony's width is 4 meters.
' it's ' meaning ' it is'. e.g. 'It's over there' ; 'It is over there'. However, ' its ' is in the plural form and no apostrophe.
Put the apostrophe in mices right after s.: mices'
No apostrophe is to be putted in this sentence.
Personally, no. But it's not incorrect to put the apostrophe.
"Volkswagen" doesn't require an apostrophe.
no matter what you usually have to put a period after an apostrophe because it's the end of a sentence.
'Are not' becomes ' aren't '. 'Aren't ' becomes further Americanised corruption to 'aint'. These are not good These aren't good. These aint good. ( Not the double negative of 'These aint no good'. It's like saying 'These are not not good'.
won't (:
I'd
No.
we'll
No, you do not need to put an apostrophe in the word "hundreds" unless you are indicating a contraction or possession.