A letter used in place of a numeral is called a variable.
variable
It is O because it's not needed in the Roman numeral system for place value purposes as the place value of the numerals are self evident
Roman numerals use letters in place of numbers. An unknown variable in algebra uses a letter instead of a number.
An abjad numeral is an Arabic letter used as a number, following a traditional order.
if there is a letter (example n, z ) instead of a number in algebra it stands in place of that number. this means if you are doing multiplication you are going to divide the numbers to get the answer for your letter . if you are doing division you do it the other way around! easy
Place value is not used in the Roman numeral system.
The numeral zero (0) is used in place of the lowercase letter O (o). In most fonts, the 0 is taller than the (o) and narrower than the capital O.
A letter that stands for a number is called a variable. Any letter or value can be used as a variable.Im guessing, by the question, its a Roman Numeral. But the wording is bad. Will a supervisor edit that?
VariableA letter that is used in place of a numeral is generally called a variable. You can use any letter to represent a numeral, but the most commonly used letters are a, b, c, n, x, y, and z. If the two inuend and subtrahend, addends, factors, or divisor or dividend are both represented by a variable, then it is impossible to tell what the variables stand for. For example, there is no way to tell what a and n stand for in a-n=0. A and n can stand for 5 and 5, or 9 and 9, or anything! Since the difference is 0, then if n=a, the equation would be true!For further information, visit http://www.answers.com/ and search variables.
The Roman numeral system does not use the letter A.
Digamma. This obsolete letter of the Greek alphabet was primarily used as a Greek numeral.