a,b,c. n is used alot. they are called varibles
a variable.
b
a variable
A letter used to represent numbers is called a variable; the most common ones are 'x' and 'y'.
Without context, it is difficult to say. I guess you are referring to number bases greater than 10 where letters are used to represent digits above 9; the first digit would be A, the second B and so on. In these cases the letter A is being used to represent 10 times the column value where it is. For example in hexadecimal, the A in 0x6A3 represents 10 x 16 = 160 in decimal (since it is in the sixteens column of the number).
A letter used to represent a number is a variable of sometimes a constant.
o
Variable
A letter used to represent a number is called a variable. Typically, the letters x and y are used, but technically you can use any letter of the alphabet.
The number 11, (in hexadecimal) is the letter 'b'
A variable
a variable.
a variable
A variablẹ
Variable: A letter or symbol used to represent a number or quantities that vary
The letter that represent the composite number is letter C.
That would be Roman Numerals.