No you don't; if the sentence starts with a number then that number counts as the first word for the purpose of capitalization rules. Example: 1990 was a good year.
Yes it should.
This is usually where the specification of seniority comes : Junior (Jr.) Senior (Sr.) or a numeral (I II, III, IV, etc.) to define family members who otherwise have the same name.
The homophone for forth is fourth, as in the numeral four.
The numeral 12 is spelled "twelve".
The numeral 46 is spelled quarante-six.
The numeral 460 is written out "four hundred and sixty."
The Roman numerals for 1 is I
A roman numeral in parentheses follows the name of the metal... apex
The Roman Numeral for million is a capital M with a bar over it. NOT to be confused with their numeral for thousand which is only a capital M with no bar.
With capital letters.
XVI (10+5+1)
'lxxxv' is not a Roman Numeral. Roman numerals are written as CAPITAL letters. It should be LXXXV = 85.
VII, which is the capital v followed the capital i, twice.
The way to read this numeral is as follows: lxix = l + x + (x-i)
That would be III (three capital I's).
L is 50. See link for a good article.
Type a double capital I as in II
27,226 = (XXVII)CCXXVI Usually in capital letters