Identity Theft Answers

How many four-digit personal identification numbers (PIN) are possible if the PIN cannot begin or end with a 0 and the PIN must be an even number?

What are the total amount of choices possible if an individual is to create a 4 digit password using the digits 0 through 9 inclusive, but not using the digit 0 as the first character of the password?

An identity thief watches someone enter a 4-digit PIN and manages to see the first two digits. If the thief tries guessing the PIN, how many possibilities would there be?

A password is 4 characters long and must consist of 3 letters and 1 of 10 special characters. If letters can be repeated and the special character is at the end of the password, how many possibilities are there?