Brainteaser #1: "Secret Password"

Michael wants to get in the math genius club. There is a man guarding the place of the club. Michael hides in the bushes with the hopes of someone from the club to come and give the password to the guard. A man with the suit case appears the guard asks him: “Two plus two?” The man answers: “Three”. The guard lets him in. Michael gets confused. A few minutes later, a lady with a laptop appears. The guard asks her: “seven goes into forty nine how many times?” She answers: “Eight”. The guard lets her in. Michael gets even more confused. Finally, a kid with glasses appears. The guard asks him: “What is twenty one times two?” The kid answers: “Six”. The guard lets him in. Michael decides to take a shot, so he goes to the guard, and the guard asks him: “Five Squared?” Michael answers: “Twenty Five!” The guard shouts at him, and asks him to never show up. What answer should Michael have given to the guard, in order to get into the club?