Which of the following names apply to this number? 2

You haven't given us any choices to pick from.  But I have a feeling that you're not talking about names like Ralph, Bob, or Jacob, so I'll take some guesses from the names of sets that numbers are commonly organized into:

The number ' 2 ' is ...

-- a real number
--  a rational number
--  a positive number
--  an integer
--  a counting number
--  a natural number
--  a whole number
--  a prime number
--  an even number

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