Five students, P, Q, R, S, and T, scored different marks in an exam: 85, 90, 75, 80, and 95. P scored more than Q but less than R. S scored 80. Who scored 90?
In a class, there are four students: John, Mike, Sarah, and Lily. John is older than Mike but younger than Sarah. Lily is younger than Mike. Who is the youngest student in the class?