# Why do I hate odd numbers?

I don't know but for some reason I can never stay at an odd number of posts on frihost the only time I am okay with having an odd number of posts is when it is like 35 or 65. I don't know I always have to have an even amount of posts. Before leaving at least just always i cant post just once I need to have at least 2 so I will stay at an even number maybe I just have ocd

**8 blog comments below**

Its a bit of an odd one.

I like odd numbers. Guess I am odd that way.

**standready**on Thu Dec 22, 2011 12:18 am

I don't think it's an entirely uncommon preference, though I don't have a clue why it occurs. I can think of a few examples in my life where I mostly subconsciously pick out even numbers of things (or the more possible divisions the better). It seems neater, maybe?

**Nameless**on Thu Dec 22, 2011 1:20 am

Well, various woo-woo belief systems assign gender and other characteristics to numbers.

Kabala, for example, has the concept of male and female numbers. Odd numbers are male I think....also in Tarrot I think....

Back in the real world, odd numbers can be seen as 'spikey' 'progressive' or 'creative'. They won't divide in half - there is always 1 bit left.

We can mess with odd and even numbers to form some rules about products and other functions, but it will be best if we first express odd and even numbers in a convenient format.

All odd numbers can be made by the term 2M+1 and all even numbers can be made by the term 2N, by selecting the required value for N & M. Agreed?

(if not, consider : 3 is 2M+1 with M at 1, 27 is 2M+1 with M at 13..and so on)

Soo, what can we deduce.....

Well, the product of an even number (2N) and any other number (M) is 2NM which can be written 2x(NxM) - twice (N times M). Expressing numbers like this is really useful because we can easily show thgat 'twice' any number is always even.

So....twice an even number (2N) = 2Nx2.

You should see at a glance that this MUST be even.

Twice an odd number (2M+1) = 2x(2M+1)

And if you havce really followed this, you will know immediately that the above is ALSO always EVEN. (If you don't see it, you have 'twice a number' again (twice (2M+1))...

Next, what does odd times odd give? = (2N+1) x (2M +1)

If we do some slight of hand, we can write it as:

= (2xN)x(2xM + 1) + 1x(2xM + 1)

= 2x(2xNxM + N) + 2xM + 1

= 2x(2xNxM + N + M) + 1

Here you might see what I'm doing - I've expressed it as twice something again - only this time there is a 1 left at the end. So we have 'twice' (2NM+N+M) which is 'twice any number' which is even. The 1 left over means that odd times odd must always give odd, since even plus 1 is always odd, as we can nbow trivially show:-

Even (2N) + 1 = 2N + 1 which is twice a number with 1 left - ie it is always odd.

I hope this gives you some ideas for messing with numbers. If not then someone else might find it interesting. If you are actually a postgrade mathematician then sorry to patroniuse with this trivial messing

Kabala, for example, has the concept of male and female numbers. Odd numbers are male I think....also in Tarrot I think....

Back in the real world, odd numbers can be seen as 'spikey' 'progressive' or 'creative'. They won't divide in half - there is always 1 bit left.

We can mess with odd and even numbers to form some rules about products and other functions, but it will be best if we first express odd and even numbers in a convenient format.

All odd numbers can be made by the term 2M+1 and all even numbers can be made by the term 2N, by selecting the required value for N & M. Agreed?

(if not, consider : 3 is 2M+1 with M at 1, 27 is 2M+1 with M at 13..and so on)

Soo, what can we deduce.....

Well, the product of an even number (2N) and any other number (M) is 2NM which can be written 2x(NxM) - twice (N times M). Expressing numbers like this is really useful because we can easily show thgat 'twice' any number is always even.

So....twice an even number (2N) = 2Nx2.

You should see at a glance that this MUST be even.

Twice an odd number (2M+1) = 2x(2M+1)

And if you havce really followed this, you will know immediately that the above is ALSO always EVEN. (If you don't see it, you have 'twice a number' again (twice (2M+1))...

Next, what does odd times odd give? = (2N+1) x (2M +1)

If we do some slight of hand, we can write it as:

= (2xN)x(2xM + 1) + 1x(2xM + 1)

= 2x(2xNxM + N) + 2xM + 1

= 2x(2xNxM + N + M) + 1

Here you might see what I'm doing - I've expressed it as twice something again - only this time there is a 1 left at the end. So we have 'twice' (2NM+N+M) which is 'twice any number' which is even. The 1 left over means that odd times odd must always give odd, since even plus 1 is always odd, as we can nbow trivially show:-

Even (2N) + 1 = 2N + 1 which is twice a number with 1 left - ie it is always odd.

I hope this gives you some ideas for messing with numbers. If not then someone else might find it interesting. If you are actually a postgrade mathematician then sorry to patroniuse with this trivial messing

**Bikerman**on Thu Dec 22, 2011 4:16 am

Thanks Bikerman. I always enjoy your 'trivial messing'.

**standready**on Fri Dec 23, 2011 1:07 am

What's more hateful than odd numbers? Prime numbers. If you have a prime number as a numerator or a denominator, you can't simplify the fraction. Hence, you have to deal with it in your operations.

**loremar**on Fri Dec 23, 2011 8:05 am

I know the feeling foumy6. When I did shopping the other day I really had a giggle when I was looking at my trolley at the till. Two of almost everything. Wonder whether that says one is never enough. Or two just in case one is not enough. Or two to make one look good enough. Or two for a second chance in case one does not work out. Or two to make the experience of one more real.

**deanhills**on Fri Dec 23, 2011 11:33 am

Glad I'm not the only one. The only odd numbers I can feel comfortable with are those that end in 5... (although I haven't gone to the extreme of number of posts yet - I do it with lots of other things though)

**GuidanceReader**on Mon Dec 26, 2011 3:32 pm

truespeedon Wed Dec 21, 2011 6:43 pm