I had a thought...

[Forge]

That is just what I was taught. "One is prime, but not odd." I don't get it either, and in fact it seems wrong; maybe my math teacher got it wrong way back when in 5th grade?

I also thought that even numbers were any numbers that ended in 2, 4, 6, 8, or 0 (excluding "0" itself), but from the way you said it, Forge, it sounds like it has to be an even integer. So numbers like 4.8372 would be odd, but I was taught they were even because they ended in an even (in this case "2").

So, now who wants to debate on the (ir)rationality of pi?

Hmm. Another thing that I forgot to add is that only an integer can be odd or even. Any fraction or decimal cannot be either odd or even.

Now, pi itself is an odd number - I know it to ten significant figures - 3.141592654. I believe that it was either Pythagoras or Plato who thought that pi was equivalent to 3 1/7, but this produces a number with a large recurrent section.

pi is, for all you who do not know, the direct relationship between the length of the diameter of a circle and its circumference. I think that the major reason why it is such a bizzare number is due to the difference in vectors - the diameter will always be a straight line, whereas the circumference is a vector with a constantly altering velocity. Due to this, it is impossible to have a simple number that defines the relationship. The value of pi is a decimal value that never ends, although we need not use its exact value.

In school, 3.14 is generally the accepted value. In engineering, my dad tells me that 3 1/7 is the accepted value.

Furthermore - don't close this thread. It's providing a decent, intelligent level of conversation - well, for the Void at least.

+1 vote for best thread ever.