All students of a class are sitting in a single line. Ravi is at the 21st position from the front, and Varun is at the 14th position from the back. There are 13 students between Ravi and Varun. What is the total strength of the class?

Among five friends Pinky, Pooja, Prachi, Neha, and Payal: Pinky is older than only Pooja. Prachi is older than both Pooja and Pinky. Also, Prachi is younger than Neha, who is not the oldest. Who is the oldest?

Suraj ranked 17th from the bottom and 13th from the top in his class. How many students are there in his class?