In rugby union, 20 national teams currently qualify for each edition of the men's Rugby World Cup.The Kentucky Derby currently has a maximum field of 20 horses.A standard dartboard is laid out as 20 sectors.Twenty20 is a form of limited overs cricket where each team plays only 20 overs.Ī standard dartboard is laid out as 20 sectors. the newspaper headline 'Scores of Typhoon Survivors Flown to Manila'). fourscore to mean 80), but also often used as an indefinite number (e.g. A 'score' is a group of 20 (often used in combination with a cardinal number, i.e.The metric equivalent is 6/6.) When someone is able to see only after an event how things turned out, that person is often said to have had '20/20 hindsight'. (Note that this applies only to countries using the Imperial system. 20/20 indicates normal vision at 20 feet, although it is commonly used to mean 'perfect vision'. In some countries, the number 20 is used as an index in measuring visual acuity.The number of proteinogenic amino acids that are encoded by the standard genetic code.The International Astronomical Union shower number for Coma Berenicids.20 is the number of parallelogram polyominoes with 5 cells.

20 is the number of moves (quarter or half turns) required to optimally solve a Rubik's Cube in the worst case.

20 can be written as the sum of three Fibonacci numbers uniquely, i.e.

20 is the smallest primitive abundant number.

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 basis for vigesimal number systems.20 is a tetrahedral number as 1, 4, 10, 20.

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