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There is no "first" odd number because you can start as low as negative infinity and work your way up. If you meant first positive odd numbers, You can do the addition yourself.
The parity rules are: Odd + Odd = Even Even + Even = Even Odd + Even = Odd Even + Odd = Odd So the parity where one number is even is that of the other number. This means that you can go through a list of numbers and ignore all the even numbers. Every PAIR of odd numbers has even parity and by the previous paragraph, even parity can be ignored. So you can pair off odd numbers and ignore them.
Well, you start off with 1 and go up by 2 each time to miss out the even numbers. Also, all odd numbers end in one of the first 5 odd numbers, which are:1, 3, 5, 7, 9Schools should teach you ODD's and EVEN's at a young age - It's Year 3 stuff.Hope this answer helps though. :D
odd numbers
There is no such pattern because there are no even odd numbers. Odd numbers, by definition, are odd and therefore, not even.