sentence 1: How do I build my profile for top B-schools?
 sentence 2: How do I build my profile for Harvard, Wharton, INSEAD etc.? sentence 1: How are convex mirrors used?
 sentence 2: What is a convex mirror? What are their uses? sentence 1: Why did RBI issue new 2000 rupees note?
 sentence 2: What might be the reason for not circulating the 500 rupee notes at initial stage?
same meaning
same meaning
not same meaning