All Answers 358105 Answers

Mmmmm....that's a variation on a theme of one of the great "open" questions in mathematics...!!!

It's known as The Goldbach Conjecture and it states that every positive even integer can be expressed as the sum of two primes (maybe in more than one way, too. For instance, 24 = 19+5 = 13+11). As yet, it's never been proved.........

As to your specific question, I'm not sure that's been proved, either......but maybe someone else on this site would have more information!!!!

A mathematician by the name of Lagrange did prove that every "natural" number could be written as a sum of four squares.........

Here's a link to Goldbach' Conjecture which you might find of interest :

Thanks for that for graph and Wolfram links, these look interesting and usefull!

I haven't really been able to figure out the graphs on this site myself.

By the way, abit off topic but is your name/nickname Chris? I've seen some people calling you that and was a bit curious. :)

Firstly, thank you Ninja and Chris for your kind words.  I do the best that I can.  Thank you also on behalf of Andre Massow.  I believe he puts in long hours to make this site as good as he can.  He has made massive improvements in the last month or two.

Your ideas are good Ninja but perhaps a little harder to implement than you realise.

Firstly I want most (not necessarily all) of the information to be in the form of reference addresses (as it is now) it is easier to manage this way.

I just realised what Chris wrote.  Individual people cannot put things straight under the desired heading because only the writer of the post can edit it!

It certainly does need cleaning up.  This is not a task that can be done overnight.  

I think that niether Chris nor I can take on more than we already have.  Chris seems to spend all day and all night answering questions just to get through most of them.  (Thank you so much Chris, I really appreciate it) I possibly spend an equal amount of time on forum matters although answering questions is secondary to my other tasks.  I actually cannot handle the workload that I have already given myself and  I need to offload some of it and/or accept a less serious approach to the forum. (I no longer have the time to just enjoy the forum and explore/learn from some of the interesting posts.  I feel like all my time and effort is being used in administration)

I realize that in posting these great ideas you were not volunteering for anything, and you do not need to volunteer for anything, but if you want to help with the running of this site or the clean up of this discussed thread, that would be very greatly appreciated.

Irrespective of whether you volunteer further I thank you for putting forward your great ideas.  We always need the input of ideas.

Melody.

ND......I don't find the on-site grapher very intuitive.....  I've never been able to figure it out.....Desmos is DEFINITELY the way to go!!  It produces a way "cleaner" graph, too.

Another site.....WolframAlpha can produce some nice graphs, too......I've copied some of these into the posts.....sometimes they stay there.....sometimes they don't......I don't remember if I've tried the Tiny Pic thing with it, or not.....

Anyway, that Wolfram site has a lot of cool math capabilities....you should check it out!! Just type in what you want to do and it will take you to the correct page....for example....typing in "algebra" brings up a whole array of stuff you can do.....I've bookmarked some of the pages I use most often......

Here's the link :

Go down to Chris in your contacts.  Both incoming and outgoing messages should be displayed in there.

If it is not in there then it has probably been lost.  do you want to take a look?

You can do it on this site and I suppose we should but it is a bit 'clunky'.  I think that is Alan's term.

I usually use Desmos (It is a beautiful graphing program)

https://www.desmos.com/calculator

It's called "Desmos Graphing Calculator," ND......easy to use.......here's the link :

Both my outbox and inbox have the same messages, and they're all other messages sent from other people to me.

The message I was talking about (the one sent to CPhill) is neither in my inbox or outbox, but then again none off my sent mesages are in either my outbox or inbox.

Thank you Ninja and Chris.  I have just copied your posts over into the main body of the forum.

I'd like to continue this discussion there.

Melody.

http://web2.0calc.com/questions/sticky-note-information-pages-worth-keeping-and-developing-discussion

RESPONSE FROM CPHILL

I would also like to echo ND's thoughts....thanks to Melody for all she does on here.....

I'm still getting "phantom messages," as well.......maybe they're from a "ghost" poster.....!!!  Who knows ???

I like ND's idea about classifying the posts according to grade level or topic......I don't know if the site mods would be responsible for "moving" the topics to appropriate areas (yuck, another "task"), or whether the site could include a "menu" for the questioners in which they could choose to post where they thought most appropriate. (Maybe we could include  miscellaneous" category if a questioner were uncertain!!).

Those are my thoughts......but, I might have more as they occur to me !!!

This is a bit off topic from the question, but what website/software do you use to make those graphs? It might be usefull for answerng questions sometime.

Or better yet, make a post about how to do it, and put it in Melody's "Information pages worth keeping or developing!"

Did you see this message in your outbox after you sent it?  I think the ones that disappear, disappear altogether.

Also could you please take a look at your inbox and outbox to check if they have the correct content please?

We have the equation of a line, here.  Let's do a bit of rearranging.......we have

17x+21y+11=0     subtract 17x and 11 from both sides...this gives

21y = -17x -11     divide by 21  on both sides

y = (-17/21) - 11/21

This is a line with a slope of (-17/21)  and a "y intercept" of -11/21

Here's the graph:

This can't be solved because there is only one equation and two unknowns.

The best I can do is to graph it.

Well, I actually happen to be on the Train Saftey Society, (TSS). We have noticed this problem at the TSS, and have been encouraging math teachers around the globe to stop using such horrible depictions! We have had no luck, despite telling the teachers that this is setting a bad example for the kids. We are working as hard as we can to solve this, and will get back to you at a later date.

Council member, Devo

Train Saftey Society

I would also like to echo ND's thoughts....thanks to Melody for all she does on here.....

I'm still getting "phantom messages," as well.......maybe they're from a "ghost" poster.....!!!  Who knows ???

I like ND's idea about classifying the posts according to grade level or topic......I don't know if the site mods would be responsible for "moving" the topics to appropriate areas (yuck, another "task"), or whether the site could include a "menu" for the questioners in which they could choose to post where they thought most appropriate. (Maybe we could include a "miscellaneous" category if a questioner were uncertain!!).

Those are my thoughts......but, I might have more as they occur to me !!!

1) I have still been getting these phantom messages. It does seem like sometimes they'll apear and then just disappear once I go to a different page (that isn't my message page).

2) I haven't looked to see if this is happening...

3)I believe this happens to me too. I sent a message asking CPhill a question once, and he never responded. Maybe he never got it!

I just looked at the sticky topic "Information pages worth keeping or developing," and I can agree that it could use some cleaning up.

A sugestion I have for this is maybe we should just have one huge post containing all this information, and the author (most likely you, Melody) could just "edit" the post when more information is wanted to be added.

Also, maybe a good way to organize this is by "grade levels" of mathematics, if you will. Looking something like this:

Algebra:

-link(s)

Geometry:

-link(s)

Triganometry:

-link(s)

Probability:

-link(s)

Misc. pages:

-link(s)

...and you get the idea

That way, when someone is refering back to the sticky about say, solving inequalities, they can just go under algebra, and go directly to that link, without looking through the whole page of reposts and stuff.

The only problem with this is that there might be a limit to how much text can go in a single forum post. If this problem arises, maybe the creator of the site could allow an option for a no-max charcter count for only mods when posting something.

Also, tell the creator of the site (Andrew, I believe?) that I appriciate his work on the site, it's really made well.

Finally, thanks to your dedication to this site, Melody, without your and dedication, the site would not run as it is running!

I  thought it might be beneficial if I start making a list of things that I would like to talk to Admin about.

1) Member section - ability to find any member etc etc

2) Export feature in converstion threads

3) reply icon (Admin has already said that this is coming)

4) Sticky intro post at top of forum.

5) Please don't reduce max number of sticky topics but can moderators choose the order of them please.

more to come.

@@ End of Day Wrap - Sat 14/6/14   Sydney, Australia   Time 9:35pm 

Good Evening all,  some of you live in slow places and the sun has not yet set, but I assure you, a good evening awaits. 

It was a quiet day today.  I am definitely not complaining!  Bring on more days like this so that I can catch my breath!

There were still lots of good answers delivered by reinout-g, NinjaDevo, Will85237, Alan, Rosala, CPhill, Bertie and Bahamo. Thanks guys, you are all much appreciated.

Bahamo is new.  Welcome to web2.0calc forum.  We hope you learn a lot and enjoy yourself here. 

I spent a little time this evening cleaning up Sticky Notes.  They are a little improved but this area definitely need more time spent on it.  Some of the content is from the old forum and does not display properly.  Some content needs to be deleted or updated.  I did 'unstick' a couple of obsolete posts and I amalgamated a couple more but there is still much to do.  Andre was 'threatening' to reduce the number of sticky topics possible.  I do not like this idea but he is right, they do need to be tended properly.

Yesterday I was asked to put together a note to new question askers requesting that they be very careful about the presentation of their questions.  I did that, maybe it was in my wrap yesterday, I don't remember.  Anyway, I was then asked if something like this could be permanently 'stuck' to the top of the posted questions.  I do not have the power to do this but I think it should go into my next letter to Andre Massow (site owner and developer) Does everyone think that this is a good idea? Can anyone offer more input.  Would someone other than me like to write it?  I have put up a first draft (on the forum)but I also found an old similar post in the ignored sticky topics.  In some ways the old one is better than the new.  They need to be amalgamated and tidied up.

I have started a sticky note information thread for new people. (It is just a start)

Good answer anonymous.  It is sort of the opposite of what i said but you still need a totally solid container or a water tight container.

With mine the water goes on the inside.

With yours the water goes around the outside (it is immersed in water.)

So if it was done completely accurately my answer would be a little less than yours because mine is the inside volume.  Yours includes the actual container as well.

Your answer is a little bit better than my answer.

Why don't you become a member anonymous.  We need more answers like your one and it would be good to know who posts them.    

Joining up has been simplified - it is really easy now!

You can always, on every number, use: [NUMBER (50) ] / 100 * [PROCENT (99) ], i think.

this is an easy and quick way to reduce !

as we have 150/350 so we cut both the zeroes (of 150 and 350 )so we are left with;

150/350

=15/35   now just divide both by 5 and ull get ur answer easily 

=3/7   ANSWER 

so simple and easy to do isnt it! comes handy when ur in a hurry !