Twenty is a composite number, its proper divisors being 1, 2, 4, 5 and 10.
Twenty is used as a base number for vigesimal number systems.
In the old UK currency system, there were twenty shillings in a pound.
A group of twenty is often referred to as a score.
A polyhedron with twenty faces is an icosahedron.
... people have referred to him as the Billy the Kid of Australia.
Since his death Kelly has become an Australian folk hero. The distinctive homemade armour he wore for his ...
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