All natural numbers are special


From the department of too-geeky-joke-to-be-funny comes the following one:

All natural numbers are special:

  • 0 is special because it is the first natural number
  • 1 is special because it is the neutral element for multiplication
  • 2 is special because it is the first even number
  • 3 is special because it is the first odd prime number
  • lets suppose that there exists a non-empty set of non-special natural numbers
  • we can take the minimum of this set – but this number is special because it is the smallest non-special number
  • QED 🙂

(Original source – in Romanian)

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