Odd primes
Puzzle: Prove that all primes, including 2, are odd.
You have to think outside the box for this one. It is possible to prove, although mathematical purists(snobs?) won't like the proof. 
is this the same as to proof that all numbers are odd ?

[QUOTE=jasong;115978]Puzzle: Prove that all primes, including 2, are odd.
You have to think outside the box for this one. It is possible to prove, although mathematical purists(snobs?) won't like the proof.[/QUOTE] All primes except 2 are ODD (i.e., not divisible by 2). 2 is the ODD one out. 
[QUOTE=Mr. P1;115982]All primes except 2 are ODD (i.e., not divisible by 2).
2 is the ODD one out.[/QUOTE] Well, I'd phrase it a little differently. All, primes, except 2, are odd. Out of an infinite number of primes, only 2 is even. This makes 2 a [b]very odd[/b] prime. Therefore, all primes are odd. 
So it's a play on words.
Odd = not even, and Odd = not normal All primes are odd but not necessarily odd in the same way. 
putting it another way
All primes are odd but some primes are more odd than others:smile:

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