Seven friends S, Q, K, P, E, C and N have different ages. S is older than N but younger than E. K is older than P. Q is younger than E. C is younger than K. N is older than P. C is older than P. K is younger than Q. Which among them is the oldes t?

Sudhir ranked 14th from the bottom and 19th from the top in his class. How many total students are there in his class?

In a row of people all facing North, Zoha is 25th from the right end. Piya is 34th from the right end. Piya is exactly between Zoha and Minal. If Minal is 6th from the left end of the row, how many people are there in the row?