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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 …

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.

Define 20. 20 synonyms, 20 pronunciation, 20 translation, English dictionary definition of 20. Noun 1. 20 - the cardinal number that is the sum of nineteen and one twenty, XX large integer - an …

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 …

Welcome to “About The Number 20” – a fascinating exploration of the number twenty and its significance in various fields. Here, you will discover the diverse roles of 20 in mathematics, …

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.

Jul 11, 2023 · Delve into the intriguing world of the number 20 with these 20 captivating facts. Explore its significance in various fields and uncover hidden connections.

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."