Mrs. Everichon is convinced that there is a law or principle (as in "Foo's Law") which describes the phenomenon wherein a pond can take weeks to become 50% covered in algae, but then the remaining 50% takes only a day. [more inside]
posted by everichon
on Jul 25, 2006 -
Can someone explain coinduction (mathematics, computer science) in English? [more inside]
posted by knave
on Jul 24, 2006 -
My sweet son has many disabilities--type 1 diabetes, ADHD, depression. At 15, he just confessed with great pain that he doesn't know his multiplication tables very well. Explains a lot.
Any really wonderful suggestions that don't infantilize and humiliate him. Ones that work? Any personal success stories and moral support will make me heart you.
posted by wordswinker
on Jul 21, 2006 -
How do I process user ratings of content without skewing results of items that have only been rated once? [more inside]
posted by Orkboi
on Jul 10, 2006 -
"Math 51H provides a rigorous, proof-based introduction to linear algebra and differential calculus in several variables." Recommend a book to catch me up to the starting point for this course! [more inside]
posted by devilsbrigade
on Jul 8, 2006 -
What is the formula for calculating ebay fees so that when I sell a fixed price item and ebay takes their fees out, I get the amount that I want back? [more inside]
posted by SoulOnIce
on Jul 2, 2006 -
I am reading Douglas Coupland's new book (JPod) and I'm always a little frustrated by him. He seems to get the general vibe of nerds but is horribly off on details sometimes (in the first 50 pages, he makes reference to a "56k floppy disk"), which is agonizing. Anyway, he posits a math problem (I don't think this counts as a spoiler, I'll even omit the context and just pose the problem with page number, but if you really don't want to see anything about the book, don't read on, I guess.) [more inside]
posted by oxonium
on May 27, 2006 -
Probability of one binomially-distributed variable being greater than another one - is there a closed form for this? [more inside]
posted by wanderingmind
on May 25, 2006 -
My room has an angled ceiling. I have measured its height at the highest and lowest points, and I have the dimensions of the room. Help me determine what height the ceiling is at a particular point on the floor, and where exactly the skylight is. [more inside]
posted by xo
on May 23, 2006 -
You are suspended in a large, hollow sphere. The inside of the sphere is perfectly mirrored. There is nothing else in the sphere, and all you carry is a flashlight. You turn the flashlight on. What do you see? [more inside]
posted by tweebiscuit
on May 15, 2006 -
Suppose there's a web form with 50 checkboxes (representing options or interests), and that checking one has no effect on any of the others. A user could select any two boxes, or a half dozen, or a different half dozen, or all 50. The only constraint on the form submission is that the user must check at least two boxes. How many possible combinations are there? [more inside]
posted by Tuwa
on May 13, 2006 -
Grading dilemma: Can the median be a fair measure of a set of quiz scores? Here's the situation ... [more inside]
posted by imposster
on May 8, 2006 -
Ok, so I'm an Anthropology major ,and I decided taking a course called Quantification of Archaeological Data would be a good idea... [more inside]
posted by rbf1138
on May 7, 2006 -
I'm sort of in a crisis right now... Basically I am halfway through a bachelor in Film Studies and I realize it's garbage. I want to change my major to something that is useful. [more inside]
posted by Napierzaza
on May 5, 2006 -
How much math is there in graduate level psychology relative to graduate level economics?
posted by I Foody
on May 5, 2006 -
Game show-filter: How is the amount of money the Banker offers the player calculated on the show "Deal or No Deal?" My friends and I typically predict the amount within $10k, but I want to know the exact algorithm. Any ideas?
posted by LouMac
on Apr 18, 2006 -
I need to spend at least $25 at the grocery store to claim a discount. I want to minimize how much I go over $25.
I have a list of a half a dozen items I want and their prices.
Is there a program that can generate shopping lists that would meet the criteria? I want more than just the optimal list because I can get this discount repeatedly and I don't want to buy the same thing each time.
posted by storybored
on Apr 16, 2006 -
How can one create a best fit ellipse around a cluster of (x,y) points in a scatter plot within Excel? [more inside]
posted by geonags
on Apr 12, 2006 -
Help my friend schedule his bocce leauge: 8 bocce ball teams meet weekly, playing 8 games a week over 4 timeslots (7pm, 8pm, 9pm, 10pm) in 2 courts (courts E and W). [more inside]
posted by ao4047
on Apr 10, 2006 -
OptimizationFilter: I need to maximize a function of about ten variables. I can only approximate the value of this function at any point, by running a simulation which takes about a minute of computation time. [more inside] [more inside]
posted by lenny70
on Apr 8, 2006 -
I've read that Gödel's incompleteness theorem shows that there are definite limits to what logic, mathematics and by extension computers can do. This seems to be unknown among humanists such as myself. What are the things logic cannot do? Earlier AskMe questions about Gödel here
is especially good).
posted by Termite
on Apr 5, 2006 -
Are there any calculus-question-of-the-day sites out there?
posted by nomad
on Apr 4, 2006 -
I tutor mathematics at university and often my students forget about their appointments. Is there some kind of software (preferably that could sync with my Axim) that could email out reminders to the students? I use linux and windows.
posted by jplank
on Mar 28, 2006 -
Help me, please, with creating shapes, symbols and figures for teaching math class. [more inside]
posted by msacheson
on Mar 22, 2006 -
Besides the Monty Hall paradox, what are some other counterintuitive math problems that require a bit of a mind warp? [more inside]
posted by arcticwoman
on Mar 21, 2006 -
What are the odds? I have exactly 5,115 mp3's on my iPod. I was just sitting here at work listening to it shuffle through stuff. "Me, Myself, and I" by De La Soul came on, THEN when that was over it was immediately followed by "Freak" by George Clinton. The De La Soul track samples heavily from "Freak". What are the mathematical odds that the next track in a random playlist would be the sample source of the previous song?
posted by letterneversent
on Mar 16, 2006 -
What's the easiest way to figure out this fourth-grade math question? Divide one dollar into 14 U.S. coins.
posted by soiled cowboy
on Mar 14, 2006 -
Simple Maths Question.
If two people have an indvidual chance of 1/4 of gaining entry to the NY Marathon, what chance is there that one of them will get in. Both with be successful and neither will be successful.
Any explanation would be helpful. Thanks
posted by Cookie Monster
on Mar 4, 2006 -
Question about semi-sophisticated statistics and financial modeling - lets say you have N asset classes - each class has a mean rate of return and a standard deviation of returns. Also, assume you hold a portfolio comprised entirely of these N asset-classes, in certain proportions. How do you determine the probability that the portfolio might produce the a certain rate of return over P periods?
posted by stuehler
on Mar 2, 2006 -
Looking for songs about math! My girlfriend's sister just got into a Ph.D. program for mathematics and we're making her a mix CD to help celebrate. Poppy indie rock especially good. [more inside]
posted by hydrophonic
on Feb 23, 2006 -
Graph theory seems hot right now. Don't know much about it, though. If one wanted to learn some of the most practical, useable, and interesting results from the field where would one turn? Bonus points for applicability in social sciences and/or web apps. And, tangentially, if one was potentially interested in focusing on graph theory and the social sciences, where would one look at grad school? [more inside]
posted by namespan
on Jan 26, 2006 -
How thick would a carbon steel plate have to be to roughly approximate the bending & deflection characteristics of 5/8" to 3/4" plywood? [more inside]
posted by true
on Jan 19, 2006 -
How many different ways are there to unfold an icosahedron?
posted by garethspor
on Jan 4, 2006 -
Mathematicians: Help me stick it (back)
to The Man: Is 1.75 miles enough for a vehicle that started off moving slower than the rest of traffic to build up speed, pace a car and accurately determine its speed? [more inside]
posted by thefinned1
on Jan 4, 2006 -
How do I interpret the statistical results of an ESP test? At this ESP testing site
there's a tabulation of the daily results of people from across the world attempting to guess which of 5 cards is a target card. In the results for 12/20/2005 the top scorer had 13 hits in 25 trials for a hit rate of 52%, random chance would be 0.20. Now the website says the odds against this are 2708 to 1. First question: is this correct? Second question: if it is correct, then how weird is this statistically speaking given that there were a total of 19,886 trials by 189 users.
posted by storybored
on Dec 21, 2005 -
Can you recommend science or math books (non-fiction) that are interesting but accessible to someone with a limited math/science background? [more inside]
posted by Caz721
on Dec 13, 2005 -