Numbers and 's'

A number + dozen, hundred, thousand, million, billion, a few, several = we don't use a final 's' with these numbers

For example
one dozen (12) eggs
two hundred (200) cars
three thousand (3,000) people
five million (5,000,000) Dollars
six billion (6,000,000,000) Pounds
a few hundred students
several thousand workers

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