Whos the Real?

1

There is 10 different people that are wearing the exact same thing. and masks that have different numbers on them. There is 1 person that is Putting them through challenges and questions to try to get some information towards who the real whoever is. After every challenge, the person can write down 2 notes in their notebook. After every challenge, the person can use the info they have to eliminate 1 of the people it eliminate no one. You choose who the people are and who's trying to figure out who the real whoever is. You choose whoever they are trying to find the real one of.