Q
10th digit on the vin
An unknown number represented by a letter or symbol is a variable.
A variable.
An unknown number
b
a variable.
The unknown or the variable
A variable is an unknown number represented by a letter
"n" stands for an unknown number.
In math a letter is a variable and it can be any number.
That is called a variable. A letter is often used.
There is no way for an individual to find out the identity of a caller who used an unknown number. The mobile or telephone provider is the only one that knows the identity, but they would only give the data to someone who is authorized, such as the police if they need it for investigations.