In some countries, the number 20 is used as an index in measuring visual acuity. 20/20 indicates normal vision at 20 feet, although it is commonly used to mean "perfect vision" in countries …

Jan 4, 2014 · Watch the official 20/20 online at ABC.com. Get exclusive videos, blogs, photos, cast bios, free episodes

Middle English, from twenty, adjective, from Old English twēntig, noun, group of 20, from twēn- (akin to Old English twā two) + -tig group of 10; akin to Old English tīen ten — more at two, ten

Nov 20, 2020 · Number 20 plays a huge part in numerology, society, games and much more - that's why we've put together twenty awesome facts all about this special number.

Jul 11, 2023 · In this article, we dive into the enigmatic world of the number 20, uncovering 20 captivating facts that shed light on its significance and allure. Join us on this numerical journey …

The meaning of the number 20: How is 20 spell, written in words, interesting facts, mathematics, computer science, numerology, codes. Phone prefix +20 or 0020. 20 in Roman Numerals and …

Explore the fascinating world of the number 20! Uncover its meanings, significance in math, science, religion, angel numbers, arts, literature, and more. Dive into the magic of 20 now!

Your guide to the number 20, an even composite number composed of two distinct primes. Mathematical info, prime factorization, fun facts and numerical data for STEM, education and fun.

Properties of 20: prime decomposition, primality test, divisors, arithmetic properties, and conversion in binary, octal, hexadecimal, etc.

In English, we sometimes say "score" for 20, like "fourscore and seven years ago" (which means 87 years). In French, the number 80 is "quatre-vingts," which literally means "four twenties."