Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

You are not logged in.

- Topics: Active | Unanswered

**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 324

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)*

Offline

**{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.

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 108,522

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.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline

**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 324

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

Thank you again.

Offline

**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 324

Hi, could you also check that :

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 108,522

Hi;

That is correct!

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline

**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 324

Thank you!

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 108,522

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.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline

**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 324

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

Offline

**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 324

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

would this be the correct answer -2cd ?

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 108,522

Hi;

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

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline

**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 324

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 ?

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 108,522

Those are two fractions.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline

**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 324

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

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

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 108,522

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

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline

**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 324

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

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 108,522

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

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline

**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 324

Could you give me also an example ???

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 108,522

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.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline

**{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.

Offline

**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 324

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 ?

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 108,522

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

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

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline

**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 324

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...

Offline

**bobbym****bumpkin**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 108,522

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.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.**** Always satisfy the Prime Directive of getting the right answer above all else.**

Offline

**Al-Allo****Member**- Registered: 2012-08-23
- Posts: 324

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 ???

Offline