At age 19 in 1892, which Russian pianist wrote his Prelude in C-sharp minor, which helped launch his career?

At age 13 in 1926, which future leader was accepted as a novice at Cyprus's Kykkos Monastery? At age 13, Keisha Castle-Hughes earned a 2004 Oscar nomination for playing a Maori girl in a film about riding which an… In 1935, Rita Hayworth was billed under her real name, Rita Cansino, in a film about which detective in Egypt? In Dumas's novel, which young man set out from Gascony in 1625 at age 18 to join the King's Musketeers? At age 19 in 1984, who founded PC's Limited, selling upgraded IBM-compatible computers from his dorm room? At age 25, who won the $25,000 Orteig Prize for the first solo nonstop flight between New York and Paris? At age 26, Jonathan Dayton of New Jersey was the youngest signer of which 1787 document? At age 31 in 1977, who became mayor of Cleveland?