Teacher Zhang said that Four Treasures of the Study was put in a cupboard with four drawers, and asked the students to guess which floor the pen, ink, paper and inkstone were on. According to the orde

Teacher Zhang said that Four Treasures of the Study was put in a cupboard with four drawers, and asked the students to guess which floor the pen, ink, paper and inkstone were on. According to the order of pen and ink, Xiao Li guessed. First floor: inkstone second floor: ink third floor: pen fourth floor: paper

Analysis: Because Xiao Zhao guessed wrong, pen can only be in 123 middle school, ink can only be in 124 middle school, paper can only be in 234 middle school, and inkstone can only be in 134 middle school.

Hypothesis 1: Suppose the pen is in No.1 Middle School, because Xiao Li and Xiao Wang only guessed one right, so they are all in No.23 Middle School, only in No.4 Middle School. Paper is not in No.34 Middle School, but only in No.2 Middle School. Then inkstone is in no.3 middle school. But this contradicts Xiao Yang's correct guess. Therefore, it is not established.

Hypothesis 2: Suppose Xiao Li guesses that the ink is in No.2 middle school, then the pen can't be in No.1 middle school, only in No.3 middle school. So the paper can only be in No.4 Middle School and the inkstone can only be in No.1 Middle School. This is consistent with Xiao Yang's second guess. Therefore, this hypothesis holds.