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How much is 13?

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 It's about nine-tenths the number of Living Kings and Queens. In other words, 13 is 0.870 times the count of Living Kings and Queens, and the count of Living Kings and Queens is 1.10 times that amount. (2015 figures) (distinct Monarchs) It's about one-and-two-fifths times the number of Symphonies Composed by Beethoven. In other words, 13 is 1.444444444440 times the count of Symphonies Composed by Beethoven, and the count of Symphonies Composed by Beethoven is 0.692307692310 times that amount. (a.k.a. Ludwig van Beethoven) It's about half the number of Countries in the European Union. In other words, 13 is 0.460 times the count of Countries in the European Union, and the count of Countries in the European Union is 2.20 times that amount. (a.k.a. EU) (2016 figures) It's about three times the number of Living U.S. Presidents. In other words, the count of Living U.S. Presidents is 0.30 times 13. (a.k.a. Presidents of the United States; a.k.a. Presidents of the United States of America; a.k.a. POTUS), (2016 figures) (including current) As of this writing, there are five living United States Presidents — President Carter, President Clinton, President Obama, and the two Presidents Bush. At no point in U.S. history have their been more than six (6) living presidents, this circumstance having occurred three times. It's about one-fourth the number of Teeth in a Great White Shark's Mouth. In other words, 13 is 0.270 times the count of Teeth in a Great White Shark's Mouth, and the count of Teeth in a Great White Shark's Mouth is 3.70 times that amount. (Carcharodon carcharias) (average; including developing rows) It's about one-fourth the number of Countries in Africa. In other words, 13 is 0.240 times the count of Countries in Africa, and the count of Countries in Africa is 4.20 times that amount. (2016 figures) (sovereign states recognized by the UN only) It's about one-fifth the number of Submarines in the US Navy. In other words, 13 is 0.180 times the count of Submarines in the US Navy, and the count of Submarines in the US Navy is 5.60 times that amount. (a.k.a. Subs) (includes all types, all classes) (2015 figures)