Q: What is the sum of the interior angles of a pentagon?
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A: 540

Q: Which novelty swing dance, derived from the Charleston, was named following Charles Lindberg's crossing of the Atlantic in 1927?
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A: lindy hop

Q: What name was given to the predominant type of 20th-century battleship, with an 'all-big-gun' armament & steam turbine propulsion, that was named after the first of the kind, launched by the Royal Navy in 1906?
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A:
dreadnought