A, B, C, D, E, F, and G are seven cousins of different ages. A is younger than only E. G is younger than C but older than D. B is the youngest amongst them. F is younger than D. D is younger than how many people?

All 48 people are standing in a row facing the North. Harry is 13th from the right end while Roshan is 20th from the left end. How many people are there between Harry and Roshan?

All 40 students in a class are standing in a row facing north. Rohan is 18th from the right end while Kajal is 22nd from the left end. How many people stand between Rohan and Kajal?