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**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 294

Hi, just wanted to do a check-up :

If had :

would this be correct :

thank you

*Last edited by Al-Allo (2013-07-03 03:10:41)*

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**{7/3}****Member**- Registered: 2013-02-11
- Posts: 210

yeah

There are 10 kinds of people in the world,people who understand binary and people who don't.

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 87,255

Hi Al-Allo;

I see you have picked up latex. Very good.

**In mathematics, you don't understand things. You just get used to them.Of course that result can be rigorously obtained, but who cares?Combinatorics is Algebra and Algebra is Combinatorics.**

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**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 294

Yes, I thought you needed to know programming to use latex ^^

Thank you again.

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**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 294

Hi, could you also check that :

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 87,255

Hi;

That is correct!

**In mathematics, you don't understand things. You just get used to them.Of course that result can be rigorously obtained, but who cares?Combinatorics is Algebra and Algebra is Combinatorics.**

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**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 294

Thank you!

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 87,255

If you wish in latex you can replace the * with \cdot to make it look a liitle better.

**In mathematics, you don't understand things. You just get used to them.Of course that result can be rigorously obtained, but who cares?Combinatorics is Algebra and Algebra is Combinatorics.**

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**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 294

Ah ok, didn't know about it! Thanks agian !

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**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 294

Just curiously, if the question what is the GCF of these two :

would this be the correct answer -2cd ?

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 87,255

Hi;

A positive answer would be greater than a negative one so 2cd is better but it is not the answer.

Of course that result can be rigorously obtained, but who cares?

Combinatorics is Algebra and Algebra is Combinatorics.

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**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 294

Ah ok, but parallely, if I said :

I'm not sure about it, but could we say that the common factor of these two is 7 ??? Or I'm totally wrong ?

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 87,255

Those are two fractions.

Of course that result can be rigorously obtained, but who cares?

Combinatorics is Algebra and Algebra is Combinatorics.

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**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 294

But, themselves aren't they factors? ? ( the two 7's )

*Last edited by Al-Allo (2013-07-03 07:02:07)*

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 87,255

The denominator of one and the numerator of the other are both divisible by 7. But not the fractions.

Of course that result can be rigorously obtained, but who cares?

Combinatorics is Algebra and Algebra is Combinatorics.

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**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 294

Ok, even if they're divisible by 7, what are you trying to tell me exactly... ?

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 87,255

That the GCF of two fractions is usually going to be a fraction.

Of course that result can be rigorously obtained, but who cares?

Combinatorics is Algebra and Algebra is Combinatorics.

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**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 294

Could you give me also an example ???

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 87,255

The GCF or GCD of 1/2 and 1/3 is defined in mathematica as 1/6. It may not be defined in math. I do not know.

Of course that result can be rigorously obtained, but who cares?

Combinatorics is Algebra and Algebra is Combinatorics.

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**{7/3}****Member**- Registered: 2013-02-11
- Posts: 210

Al-Allo wrote:

Ah ok, but parallely, if I said :

I'm not sure about it, but could we say that the common factor of these two is 7 ??? Or I'm totally wrong ?

hi al-allo first number is divisible by 1/7 and the second one by 7

There are 10 kinds of people in the world,people who understand binary and people who don't.

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**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 294

Ok, so just to be sure I've understood. Like you sais bobbym, if I'm given fractions, and we ask me what is the common factors of these two fractions, my answer must be a fraction ?

Ex : 1/2 and 1/6 would have none

and 1/2 and 3/6 would be 1/2

Right ?

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 87,255

Ex : 1/2 and 1/6 would have none

Doesn't 1 / 6 go into both of them?

Of course that result can be rigorously obtained, but who cares?

Combinatorics is Algebra and Algebra is Combinatorics.

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**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 294

Ugh. Bobbym, could you link me something about this ? I'm not sure of even understanding what I'm doing, looks like I'm lacking something...

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 87,255

Hold on one second.

The highest common factor, also called the greatest common divisor, is a feature of whole numbers (also known as integers).

According to that, there is no HCF or GCD of 2 fractions.

Of course that result can be rigorously obtained, but who cares?

Combinatorics is Algebra and Algebra is Combinatorics.

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**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 294

bobbym wrote:

Hold on one second.

The highest common factor, also called the greatest common divisor, is a feature of whole numbers (also known as integers).

According to that, there is no HCF or GCD of 2 fractions.

Well, I forgot to specify, but it's not necesary for it to be the hcf, but any common factor of two fractions. Would your quote still be correct ???

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