can you find the variance of a string by adding s/d why is an isbn string a fixed character how is it possible to figure out that a string is fixed? when removing a position in a string, a sd will be adjusted to be the same how can you tell the difference between a fixed value in a string and a variable value in a string? how do you tell if the value in a string is fixed how do you determine which positions are fixed is there a way to find the position of a string that is mostly fixed how do you find out whether something is fixed in a string is it possible to find the position of a string what's the complication of having sd in different strings? what is the difference between most variable and fixed what is a fixed value in isbn what is the threshold range for the most fixed string in a string? what is the point of the test of the threshold at which everything above is most likely fixed in a string? in an example of a fixed string, how is position of most variable variable determined which position of an integer is most likely fixed why do strings have fixed values what is the most variable string on excel how do you find where all characters are fixed in a string