All Answers

+2354

Melody:
I don't understand where you mean Reinout.

Well, then I think this is an excellent moment to test the snipping tool you told me about.

Have a look at these attachments;

knipsel1.PNG
Knipsel2.PNG
Knipsel3.PNG

reinout-gMar 2, 2014

#10

+118725

+11

He has given you two urns and 100 marbles to divide among them. 50 of these marbles are black and the other 50 are white.
After You've divided them among the urns, he is going to blindfold you and mix the urns.
You then choose one of the urns and pick one marble from that urn.
If the marble is black, you win a bus ticket home and if it is white you win a million dollars.
How should you divide the marbles between the urns assuming you prefer the million dollars?

[size=150]Hi Reinout-g. Thanks for the puzzle[/size]

Once again I will state from the outset that I am bound to be wrong BUT
I would put just 1 white marble in one urn and the rest of the marbles in the other urn.
So my chance of winning the money will be

1/2 * 1 + 1/2 * 49/99 = 1/2 + 49/198 = 148/198 = 74/99

That sounds like pretty good odds to me.
Now you can tell me why i am wrong

MelodyMar 2, 2014

+118725

I don't understand where you mean Reinout.

MelodyMar 2, 2014

+118725

I use the Snipping tool. I think it automatically comes with Windows 7.
I use it all the time. For forum purposes it is always much more convenient than using 'print screen'.
I can just snip the part of the screen that i want.
Like i said. I use it many times every day.

But of course you are right. If we could bring formulas straight in using a forum tool that would be infinitely better.
Maybe we can. Maybe we just don't know how yet.

MelodyMar 2, 2014

+2354

Melody:
Hi reinout-g (relevant comments from other people are also welcome)

You asked me how did I get the site calc to display formulas.
I just tried to get it to display the quadratic formula. I couldn't get the +- part to work.
Also I don't know if this can be bought back into the forum.
Do you know how to use any of the other buttons?
Thanks
Melody
140302 formula display.JPG

Hi Melody,

thanks for showing this to me.
I thought you eg. used some kind of [display] [/display] command which made you produce the abc formula.
Since this is an attached image I assume you made a printscreen or something similiar to that?

It is still very useful though to have the abc forumula in a ready state like that

Reinout

reinout-gMar 2, 2014

+2354

+11

And here is a new puzzle!

Easier one:

There are 31,542 people attending a concert. One person is picked from the audience and if his birthday is a monday he will win $1.000.000
What are the odds that that persons birthday is a monday?

Hard one (little easier than last time):

My slick host, which I've decided to name Steve, has again chosen to play a game with you.

He has given you two urns and 100 marbles to divide among them. 50 of these marbles are black and the other 50 are white.

After You've divided them among the urns, he is going to blindfold you and mix the urns.

You then choose one of the urns and pick one marble from that urn.

If the marble is black, you win a bus ticket home and if it is white you win a million dollars.

How should you divide the marbles between the urns assuming you prefer the million dollars?

Explain why please

reinout-gMar 2, 2014

+118725

Maybe you are right Alan but I am sure that there are some bugs in the calculator.

There is just one owner/developer of this site, Andre Massow. He has been difficult to communicate with. This is due to a huge work load on his part.
I am hoping that he will communicate with us more as time progresses as I think we could help him pinpoint and therefore fix some of the problems that he is most likely unaware of.
Plus, of course, I would really appreciate his support at times.
Still, I am very appreciative that he is providing and supporting this site, and I want to try and do right by him. Hence I would like to use the site tools as much as possible.
Melody.

MelodyMar 2, 2014

+118725

dish:
im looking for pattern on the side of a polygon inscribed in circle knowing the radius

I am sorry but you need to explain your question better. I don't know what you mean.

MelodyMar 2, 2014

+118725

I don't know if you can.

I have asked if anyone else has any ideas.

Sorry.

MelodyMar 2, 2014

+118725

MelodyMar 2, 2014

#54

+118725

+14

Hi all,
A super quiet day today.
Great answers from Bertie, Alan and I like Serena.
I also received a very nice thank you from mathbrain13.

Someone did ask if the Web2.0 calc can be set to give large answers in scientific notation.
http://web2.0calc.com/questions/how-do-i-display-large-answers-in-scientific-notation
I had a look and I can't see how this can be done but I thought someone else may have an idea.
If anyone works it out, please let us know. I don't know how to use many features of the calc or the buttons above the smilies.
If anyone gains knowledge on these matters could you please teach the rest of us. Thank you.

A Method of Statistical Inference on Two-dimensional Object
http://web2.0calc.com/questions/viewtopic.php?f=2&t=8961&p=20029&hilit=MacDonald#p20029
It appears that the witticisms of C.L.Dodgson (Lewis Carrol) and George MacDonald must now come to a close. Having been discovered in this current day time warp by the illustrious Alan, it now appears prudent for them to return to their real world of the 19th Century. Math Laughter will have to find his entertainment elsewhere. Our guests must pass through Alice’s looking glass. Their ‘time’ awaits them on the other side. They will be missed.
140302 Alice's adventure - thru the looking glass.JPG

MelodyMar 2, 2014

+118725

*
Adam Spencer. Mathematician / comedian

Postby Melody » Wed Feb 26, 2014 11:34 pm

I just watch a you tube that I quite enjoyed. I thought some of you may enjoy it as well.

Adam Spencer
Born: January 27, 1969 (age 45), Gladesville
Occupation: Disc jockey, Television Show Host, Radio personality, Comedian, Mathematician
Biography: Adam Barrington Spencer is an Australian radio presenter, comedian, and media personality. He first came to fame when he won his round of the comedic talent search Raw Comedy in the mid-1990s. Soon thereafter, he began working at Triple J, on mid-dawn and drive shifts before hosting the Triple J... MORE

www.ted.com/talks/adam_spencer_why_i_fell_in_love_with_monster_prime_numbers.html
Melody online
Posts: 2567
Joined: Sat Sep 28, 2013 2:59 pm
Location: Sydney, Australia

MelodyMar 2, 2014

+33666

With 5x+10 equal to angle in degrees then with cos(angle)=1/2 we must have 5x+10 in the form 360n+60 or 360n-60, where n is an integer. That is, x must be in the form 72n+10 or 72n-14. With n = 0 only the first form gives x in the range 0 to 360; with n = 5 only the second form gives x in the right range; with n = 1, 2, 3, and 4, both forms give x in the right range. The values I get for x this way are: 10, 58, 82, 130, 154, 202, 226, 274, 298, 346, which match those in Melody's picture. Now I'm happy too, Melody!

AlanMar 2, 2014

+118725

Jem:
5.7 to the power of -4?

It is the same as 1/(5.7) ⁺⁴

5.7^(-4)=

MelodyMar 2, 2014

+118725

mathbrain13:
Thank You Melody.

You are very welcome.

Are you going to try the one I gave you? You don't have to, I thought that you might like to.

MelodyMar 2, 2014

+118725

bvhjhgfchjkh:
how to make decimals in to fraction to be able to measure on a ruler

0.6 = 6/10

0.004 = 4/1000 (the 4 is in the third place after the point so there are 3 zeros on the bottom)

0.00052 = 52/100000 (the last digit 2 is the 5th place after the point so there are 5 zeros on the bottom)

These answers can all be siplified

Now, am not sure what you mean by able to measure on a ruler. Sorry.

MelodyMar 2, 2014

Thank You Melody.

GuestMar 2, 2014

+118725

mathbrain13:
4x + 6 + 3 =

please explain step by step

4xboxes + 6+3 = what do your think?

How many xboxes do you have? Still just 4
How many numbers do you have? 6+3=9

so the answer must be
4x + 9
------------------------------------------------------------
You can only add or subtract like terms. The terms are like if they have exactly the same letters and those letters must be raised to exactly the same powers.
Try this one
5x+3y-2y+7+9 =

MelodyMar 2, 2014

+118725

richard:
:lol:

:lol: [center] [color=#80BF40][center][input][inputrad][/inputrad][/input][/center][/color][/center]By the end of grade one, students learn to understand and use the
concept of ones and tens in the place value number system. Students add and
subtract small numbers with ease. They measure with simple units and locate
objects in space. They describe data and analyze and solve simple problems.

So?

MelodyMar 2, 2014

+118725