10th digit on the vin
Q
An unknown number represented by a letter or symbol is a variable.
A variable.
b
An unknown number
a variable.
The unknown or the variable
"n" stands for an unknown number.
A variable is an unknown number represented by a letter
A polygon with an unknown number of sides is called a n-gon. The letter "N" in n-gon stands for unknown.
In math a letter is a variable and it can be any number.
That is called a variable. A letter is often used.