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The Amazing Race 20 is the twentieth installment of the American reality television show The Amazing Race. The Amazing Race 20 features eleven teams of two, each with a preexisting relationship, in a race around the world.. The season premiered on Sunday, February 19, 2012. It aired on CBS in the United States on Sunday nights at 800 p.m. ET/PT with the twohour …20 is a pronic number.; 20 is a tetrahedral number as 1, 4, 10, 20.; 20 is the basis for vigesimal number systems.; 20 is the third composite number to be the product of a squared prime and a prime, and also the second member of the (2 2)q family in this form.; 20 is the smallest primitive abundant number.; An icosahedron has 20 faces. A dodecahedron has 20 vertices.
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