In a class, boys stand in a single line. One of the boys is seventeenth in order from both ends. How many boys are there in the class?

M, A, T, H, and S each have different ages, and all ages are integers. M is younger than only two persons. H is 88 years old, which is the second highest age. S is younger than M but older than A. Who is the eldest?

D, R, A, W and S have scored different marks. Only one person has scored between W and S. Only one person has scored between S and D. A has scored less than W and S. How many people have scored less than R?