At first, when Zhao Yu stated his answer, he wanted to reprimand the three examiners! He thought the interview questions that the three of them gave him were crazy! Such ridiculous questions weren't suitable for mere detective selection, but were more for genius selection!
Plus, Zhao Yu could tell that the three examiners had scholarly temperaments. They might be knowledgeable experts in the field of higher education, but they definitely had no idea how real a investigation was carried out!
Do they think that solving a case depends on figuring out a few silly quizzes? This was an interview for higher levels than mere detectives. Wasn't this a careless act on their part?!