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Melody
Nombre de usuario
Melody
Puntuación
102459
Stats
Preguntas
859
Respuestas
27123
879 Questions
27718 Answers
+4
599
16
+102459
Feature Questions 1 - Started 8th May 19
I have been thinking for a while now that it would be nice if we could showcase our best or most interesting answers somewhere.
When the forum was much, much smaller, I used to look at ever question and answer and put together a group of the best
lee mas ..
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Melody
8 may. 2019
+7
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Congratulations CPhill on clearing the 100,000 hurdle !
Congratulations CPhill on clearing 100,000
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Fuera tema
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Melody
4 may. 2019
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RAZIEL305 is using this as a cheat site
I am recieving complaints that RAZIEL305 is using this as a cheat site,
I just answered one of his questions without realizing but I did not give an answer as such.
I gave him/her the tools (information) to work out the answer for
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Melody
9 mar. 2019
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Happy Birthday ALAN
I'm sorry I am late. I got the date muddled up.
But I hope you had a Great Birthday and
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Melody
26 feb. 2019
+5
836
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How to upload a picture.
I think different members do this differently.
I just tried to upload a pic from my computer in the 'normal' way and I could not make it work.
So maybe other people can comment here.
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Melody
14 feb. 2019
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If a question is ticked that does not mean you cannot continue it.
If a question is ticked that does not mean you cannot continue it.
NOR does it mean that any mathematician has checked the answer.
Even if it has lots of hearts or it looks very impressive, it still could be incorrect!
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Melody
27 ene. 2019
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Happy Birthday CPhill!
*****
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Melody
19 dic. 2018
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What do answerers want from you?
Answerers want to see you learn!
They want to see that they are helping you to learn.
They want you to ask questions about their answers, they want you to interact with them!
Never just accept an answer that you do not understand.
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Melody
1 dic. 2018
+6
703
7
+102459
Try something new - Expansion challenge.
Find the coefficient of in the expansion of
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Melody
18 sept. 2018
+7
1018
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+102459
Interesting puzzle clip
I just watched this puzzle clip.
Some of you may find it interesting too :)
https://www.youtube.com/watch?v=dh4nEuhZBgg&feature=em-subs_digest
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Melody
18 may. 2018
+12
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20
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Should you consider anything before you answer a question?
I would like answerers to think about why they are answering questions BEFORE they supply answers.
Are you seriously trying to help the asker to learn?
Are you mostly interested in showing your own cleverness or increasing your
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Melody
13 may. 2018
+14
1
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A question for Alan.
Alan, I would like to know how to do MonteCarlo simulations.
I decided to ask publicly because maybe other people would like this too.
Can you show me or do I need a special program?
Thanks :)
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Melody
7 feb. 2018
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Happy Birthday Heureka
A little message just told me it was Heureka's birthday yesterday!!
I hope you had a great day Heureka
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Melody
1 feb. 2018
+10
991
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A trig exact ratio memory trick.
This trig memory trick from TheXSquaredFactor is really good.
It is for 'remembering' the sine and cosine of angles that most students are told to memorize.
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Melody
23 ene. 2018
+7
1018
13
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Problems with LaTex
Latex has not displayed properly for a couple of weeks now.
Have other people had a problem or is it just my display?
For instance, this answer of Hectictar only displays as coding for me, it does not display as it should.
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Melody
13 ene. 2018
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#2
+102459
+1
You have to add up the 4 lengths and then divide by 4 to get the average.
Melody
29 sept. 2013
#2
+102459
+1
I think this question is in italian, I put it through a translator and this is what I got.
A trapezoid rectangle has the smaller base, the height and the oblique side respectively 9cm long, 4cm 5cm.sapendo cha and the projection of the oblique side on the basis mangiore is 3cm long, determine the extent of the perimeter
Unfortunately, I still don't understand the question. sorry.
Melody
29 sept. 2013
#1
+102459
+1
I have no idea what your question means.
Can you explain yourself better?
Melody
29 sept. 2013
#1
+102459
+1
With your fingers.
Melody
29 sept. 2013
#1
+102459
+1
You could do it on your calculator if you have a fraction button.
otherwise
27 1/4 - 12 8/9
= 27 + 1/4 - (12 + 8/9)
= 27 + 1/4 - 12 - 8/9
= 27 - 12 + 1/4 - 8/9
= 15 +1/4 - 8/9
hopefully you will recognise that 1/4 is less than a half and 8/9 is more than a half. The first one needs to be the biggest unless you want to deal with negative numbers.
So I suggest you change 15 + 1/4 into 14 + 1 + 1/4 and, 1 and a quarter is 5 quarters.
so
=14 + 5/4 - 8/9
Now, you cannot add or subtract fractions unless the denominators (bottoms) are the same. You must find a number that 4 goes into and 9 goes into. 4*9 will work and in this case it is the smallest one.
So you will have to change it to 14 + something over 36 - something else of 36
and I am going to let you finish by yourself.
Happy puzzling.
Melody
29 sept. 2013
#1
+102459
+1
How much does an atom of iron weigh? I guess you could google this just as easily as I could. Cheers.
Melody
29 sept. 2013
#1
+102459
+1
Just convert the km to metres and do the division on your calculator. The units cancel out. the answer will just be a number.
or
You could convert the metres to km and do the division. The answer will be the same.
Melody
29 sept. 2013
#1
+102459
+1
The probability of getting at least one heart is the compliment of getting no hearts.
What I mean is, you either get a heart or you don't so the sum of these 2 probabilities is 1.
All probabilities are between 0 and 1 (0 = can't happen) (1 = must happen)
The probability that the first chosen is not a heart is 48/52
now there are only 51 cards left and only 47 of them are not hearts so
The probability that the second chosen is not a heart is 47/51 etc
So
The probability that none are hearts is
P(no hearts) = 1 - [ 48/52 * 47/51 * 46/50 * 45/49 ]
I hope that you LEARN from my answer.
Melody
29 sept. 2013
#1
+102459
+5
Firstly what is bidmas? Do you mean BODMAS ? If you mean bidmas please tell me what the i stands for?
BODMAS stands for
Brackets then
of (as in power of) then
division and multiplication equally important just work left to right then
addition and subtraction equally important just work left to right
Your first question is so easy that I am sure you can do it yourself. Just try putting the brackets in different places until it works.
The second one is a bit tricky. What i will tell you is that it is not 4 squared. There is only one place that you can put the first brackets to change this. There will be 2 sets of brackets altogether.
good luck. Happy puzzling
Melody
29 sept. 2013
#1
+102459
+1
Without any brackets this expression is really
=35000 * x^2 - (x / 200) * x
=35000* x^2 - x^2 / 200
=x^2 * (35000 - (1/200))
=34999.995 * x^2
Melody
29 sept. 2013
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