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How much is 13?

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It's about seven times the number of Escalators in the State of Wyoming.
In other words, the count of Escalators in the State of Wyoming is 0.10 times 13.
(2013 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)
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 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 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)
There are 28 member countries in the European Union, the latest member of which is Croatia. The EU is largely urban, with sixteen cities having a population of one million or more, and 75% of the population living in an urban area.
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)
A Great White Shark has 48 exposed teeth on their upper and lower jaws. Behind these exposed teeth are developing teeth — up to 300 in about 5 rows. The sharks will continuously lose and replace the exposed teeth throughout their lives.
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)