The alpha-numeric data is a combination of alphabetic and numeric characters. Let's check each option:

568 - This is numeric data because it contains only numbers.

SS3 - This is alpha-numeric data because it contains both alphabetic characters ("SS") and a numeric character ("3").

10.00 - This is numeric data because it contains numbers and a decimal point, which is still considered numeric.

Twenty-five - This is alphabetic data because it contains only letters and represents a textual representation of the number 25.

So, the alpha-numeric data among the options is "SS3".