Hello, Eddy and Keke. Welcome to my sick and twisted– nah I'm just kidding. You know what a riddle is, you like solving them, and I'm serving one nice and hot.
Input your answer by appending it to the uniform resource locator in place of "THEPUZZLE". Take a hint if you're stuck.

First Question:

You have four games, two of each. How many cards does one need to play all of the games?