10 लड़कों की एक पंक्ति में, जब रोहित अपने बाईं ओर दो स्थान स्थानांतरित हुआ, तो वह बाएं छोर से 7वें स्थान पर आ गया। पंक्ति के दाएं छोर से गिनने पर उसका मूल स्थान क्या था?

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?