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Watch the official 20/20 online at ABC.com. Get exclusive videos, blogs, photos, cast bios, free episodes.
20 is a natural number with various mathematical, scientific, cultural and historical significance. Learn about its factorization, tessellations, polyhedra, sporadic groups, Rubik's cube, atomic number, vision, sports and more.
ABC's 20/20 is the prime time news magazine program featuring David Muir. From newsmaker interviews, hard-hitting investigative reports, exclusives, compelling features and medical mysteries.
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ABC News. 20/20 combines hard hitting investigative reports, compelling human interest pieces, and newsmaker interviews. A staple of primetime television on Friday nights for over 3 decades,...
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20/20 features true crime, exclusive interviews, investigative reports and high profile stories. Watch full episodes of 20/20 free online on the official site of the award-winning program.
Learn the meaning, history, and usage of the word twenty, a number equal to two times 10. See examples, synonyms, phrases, and related words for twenty.
Learn about the properties, factors, and uses of the number 20 in different systems and languages. Find out why 20 is an abundant number, a base 20 system, and a polyhedron.
