The cardinal number that is the product of three and ten. The number 30.
From Old English þrītig, literally meaning 'three tens.' Formed by combining þrīe (three) with -tig (a suffix indicating tens), following the same pattern as other multiples of ten.
Thirty represents a fascinating linguistic fossil - the '-ty' ending in all our multiples of ten preserves an ancient counting system where groups of ten were the fundamental building blocks of larger numbers.
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