898 posts tagged with math.
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Why should "e" exist?

Why is the number "e" so... [more inside]
posted by nondescript on Sep 9, 2012 - 17 answers

Help me understand a little logic problem.

Help me understand this. Math/logic puzzle follows... [more inside]
posted by TheHollowSeasThatRoar on Sep 5, 2012 - 6 answers

Too much noise in my data

Putting on the math signal: calling the statistics-literate. Trying to change my weight/body composition and track progress in a useful way, but I'm having trouble separating normal daily variation from actual real change. [more inside]
posted by ctmf on Sep 1, 2012 - 15 answers

Help her learn Alg II by Tuesday

Sister just learned she has to take an Algebra II test on Tuesday that covers the whole shebang. She's forgotten (repressed?) most of it. What's her best bet for an Algebra II crash course that will go over all the topics? She's very smart, but not a math person.
posted by goosechasing on Aug 30, 2012 - 11 answers

Looking for a new or different High School math test generator, and Apple programs or apps for use in the classroom

I'm looking for software for a high school math teacher: first, a better/newer test generator, and second, in-classroom programs, bonus points for apps for an Apple laptop and/or an iPod touch. Details inside. [more inside]
posted by filthy light thief on Aug 28, 2012 - 2 answers

x + y = A in pre-calc. Help me solve for x and y!

What do I need to know to be ready for pre-calculus? [more inside]
posted by sacrifix on Aug 25, 2012 - 16 answers

The Iceman Wondereth

How much is an ice cube from my fridge worth? [more inside]
posted by ecorrocio on Aug 23, 2012 - 14 answers

How does science education work?

What's important for me to know about being a science teacher, since I've only taught math but will now be training teachers of both contents? [more inside]
posted by violetish on Aug 19, 2012 - 2 answers

"Why am I supposed to divide here?"

I need books that are good at explaining how to explain things to children. [more inside]
posted by kingfishers catch fire on Aug 14, 2012 - 5 answers

My Trig Teachers Name Was Mr. Angle But That Didn't Make Him A Good Teacher.

My math skills are no where near where I'd like them to be. Can you recommend a self-paced math learning site? Pretty much any branch of math can apply. [more inside]
posted by Ookseer on Aug 13, 2012 - 7 answers

Math is Hard (I need help)

Math is hard. Please help me with a slope-related problem. [more inside]
posted by anastasiav on Jul 22, 2012 - 11 answers

Recommend a programmer a book that teaches high school maths step by step

Can you recommend a programmer a book that teaches high school maths step by step? I did maths at high scool and I was OK at it. However, fifteen years later, after forgetting almost all the maths I learnt back then, I am diving deep into the theory of programming algorithms (sorting, tree structures, graph algorithms and so forth). I find the programming straight forward, but I am struggling with the theory and proof of algorithmic time and space complexities. I am looking for a book that will cover algebra, logs, limits, inductive proof, matrix manipulation and so forth. [more inside]
posted by maryrosecook on Jul 21, 2012 - 11 answers

Mathless Engineer, Need Help!

How can I learn calculus and differential equations well, in a relatively short amount of time? [more inside]
posted by anonymous on Jul 21, 2012 - 8 answers

List places to teach/instruct/adjunct undergrad Math in Seattle?

List places to teach/instruct/adjunct undergrad Math in Seattle? [more inside]
posted by brighteyes7 on Jul 20, 2012 - 2 answers

The Limits of Flatness

Are there an infinite number of 2D shapes? [more inside]
posted by mwachs on Jul 19, 2012 - 17 answers

Mac friendly computer software to draw math pictures.

Anyone know of a Mac friendly computer program that makes it easy to draw geometric figures? Preferably free, but I'm willing to pay if its not too much and if its worth it. [more inside]
posted by junipero on Jul 17, 2012 - 19 answers

Operations in the Klasies Caves

I was helping my 4th grade age sister-in-law with her math homework, and came across a question that I couldn't figure out. Can you do it? [more inside]
posted by symbollocks on Jul 13, 2012 - 13 answers

Math of Astrology

Could you recommend a book or web site on the math of astrology? [more inside]
posted by Paquda on Jul 11, 2012 - 7 answers

Getting my math(s) right.

Maths (math) people of the US: I need your help in working out if certain British conventions would be understood or standard in the US classroom. [more inside]
posted by cincinnatus c on Jul 10, 2012 - 15 answers

Physical Mathematics?

Is there a book that teaches math via physics? [more inside]
posted by adamdschneider on Jun 20, 2012 - 7 answers

Best network/graph theory software for non-techies?

I'm teaching a minicourse about networks, graphs, and computation to a non-technical audience (mostly grad students in the humanities.) What's the right software platform? [more inside]
posted by escabeche on Jun 18, 2012 - 7 answers

Pocket Anthropology

Is there a way to find out approximately when I left this wad of money in my (very old) jacket pocket, using statistics and date/number info from the bills? What would be the minimum number of bills needed for such a thing?
posted by nile_red on Jun 17, 2012 - 10 answers

It's a piece of cake to bake a pretty cake

How do I score my fantasy cake contest in the most fair manner? [more inside]
posted by disillusioned on Jun 14, 2012 - 9 answers

Exit strategy, please

I'm a math PhD student with two years left. I'm not sure I want a job in academia (but maybe I do). What should I be doing to maximise chances of success (whatever that means)? [more inside]
posted by hoyland on Jun 12, 2012 - 13 answers

Why can the reals be well-ordered but not countable?

Math-Filter - Set theory edition: I am struggling with the difference between countable infinite sets and well-ordering. Longer explanation inside. [more inside]
posted by heybearica on Jun 12, 2012 - 16 answers

An odd property of Eigenvectors

The first eigenvector is related to the sum of the columns of a matrix. What is this property called? [more inside]
posted by bessel functions seem unnecessarily complicated on Jun 9, 2012 - 7 answers

Math Geeks!! Assistance needed!!

How should a surcharge be calculated? [more inside]
posted by elf27 on Jun 7, 2012 - 11 answers

How to Find The Average Commenter?

Harmonic or Arithmetic Mean?: I'm trying to settle an argument with my wife - is using the arithmetic mean or harmonic mean more appropriate when finding the "average" number of, say, online comments made by a large number of people, where a significant portion of them make only one comment and a few people make the bulk of the comments? [more inside]
posted by salsamander on Jun 2, 2012 - 13 answers

Making the impossible possible

Help with a simultaneously math & non-math question: Finding the square root of a negative number was impossible until imaginary numbers came along. What are examples of other things that were impossible until we altered systems that have been created? [more inside]
posted by CaptainCaseous on May 24, 2012 - 22 answers

Need formula for APR with long/short odd days.

Need formula for APR with long/short odd days. [more inside]
posted by joshuamcginnis on May 23, 2012 - 2 answers

Math Help - Library Contest Edition

Math Help! We're doing a big inventory project in my library this summer and we want to attach weekly prizes to it to help motivate the poor students who have to do all the scanning. Trick is, students do not work the same amount of hours per week, so we would like some way of weighting each student's output so that those that work less feel like they can compete with those who work more while not disadvantaging those with longer hours by requiring them to go insane in order to keep up. How to keep things fair and sane? [more inside]
posted by robocop is bleeding on May 10, 2012 - 20 answers

How to model the accident rate on a certain stretch of road

How could I approach modeling the number of accidents on a certain stretch of road? I've got some semi-ecological approaches in mind but no idea if they're workable. Are there standard approaches to this sort of problem? [more inside]
posted by col_pogo on May 7, 2012 - 9 answers

I want to drink and derive in the comfort of my own home.

Good online accredited Precalculus and Calculus classes? [more inside]
posted by spinifex23 on May 3, 2012 - 5 answers

Prorating monthly fees

What is the right way to calculate daily rate for monthly charges? [more inside]
posted by primethyme on May 2, 2012 - 10 answers

Pageviews vs Visitors: Do people really just sit there and reload all day?

On the Lifehacker/Gawker websites, what do the views/viewer numbers really mean? How can articles with 100,000 pageviews only have 10,000 visitors? [more inside]
posted by sdis on Apr 28, 2012 - 9 answers

Identifying urban centers using an algorithm based on topological prominence

Calling geographers: has anyone applied the idea of topological prominence to population density? [more inside]
posted by miyabo on Apr 27, 2012 - 7 answers

Google, why do you make my brain hurt?

How does real time google analytics measure the "active visitors on site"? Please help me, because apparently I fail at math. [more inside]
posted by cgg on Apr 25, 2012 - 2 answers


I'd really love a detailed explanation of the terms and humor in this math / science related XKCD cartoon. [more inside]
posted by lazaruslong on Apr 25, 2012 - 14 answers

Is it possible to solve for X?

(Y)(S^N) = (M)(X^(N+E)) - (Y)(X^N) Is it possible to solve for X? [more inside]
posted by spacediver on Apr 25, 2012 - 24 answers

Are the odds (ever) in my favor in this raffle?

Are the odds in this raffle significantly better than last year? [more inside]
posted by madajb on Apr 19, 2012 - 17 answers

How to get 2nd Bachelor's Degree from UCLA after foreign-based Bachelor's?

Seeking 2nd Bachelor's degree in Applied Mathematics from UCLA, then PhD. Details below. [more inside]
posted by Hassoon on Apr 17, 2012 - 5 answers

Me + Math Major = Success?

Do you have to be "inherently" good at math to successfully major in math as an undergrad? [more inside]
posted by lobbyist on Apr 14, 2012 - 27 answers

Bathrooms and Statistics

My workplace has 3 small bathrooms. It seems to me that if I go to use one of them, and it's occupied, there is a statically higher chance the 2nd and even 3rd bathroom will be occupied (vs the chance that they would be occupied if the 1st one was not). Is it true? [more inside]
posted by lohmannn on Apr 13, 2012 - 30 answers

Let's do some math

A is the top of a vertical line 30 feet in length. B is at the base of that line. C is 63 feet from B in a horizontal right angle. What is the distance from A to C. [more inside]
posted by ephemerista on Apr 9, 2012 - 7 answers

Help me find a specific Children's TV show.

Tracking down a pre-2000 children's TV show with a female presenter in a fairy tale style magician's house. [more inside]
posted by jeffkramer on Mar 21, 2012 - 5 answers

How many people lived in the U.S. between 1974 and 2004?

[MathFilter] How many people were alive in the U.S. between 1974 and 2004? [more inside]
posted by arveale on Mar 20, 2012 - 11 answers

Help me make planet dice.

Is there an easy way to map a sphere onto a dodecahedron? I'm playing with the idea of generating "planet dice." [more inside]
posted by Karmakaze on Mar 19, 2012 - 11 answers

Pi R Square, but this is a circle

Please help me with some basic math: The circumference of a circle is 8 inches. Extend that circle by 8 inches from circumference (i.e. adding 16 inches to the diameter). Now what is the circumference of the larger circle? [more inside]
posted by _paegan_ on Mar 16, 2012 - 22 answers

Can you solve a time dilation math problem?

I'm writing a story and it has to do with time dilation and I don't want it to be one of those stories where people roll their eyes and say, "Well... It's just a story." I want accurate math. I suck at math. [more inside]
posted by CarlRossi on Mar 10, 2012 - 7 answers

Linear Algebra was easy, but I can't add 1+1 without using my fingers. WHAT.

Basically, what it says. I've been brushing up on my math skills via Khan Academy, and I'm running into a problem I hit when I was in school. Basically, the math *concepts*, like Algebra, Trig, and the like? I'm able to get really easily. But, manipulating the numbers and doing the basic arithmetic? Hard. Sometimes even with a calculator, I'll miss carrying over a negative sign, and I'll get the problem wrong, despite knowing the concepts really, really well. What's going on here? Is my ADHD not under control? Are these symptoms of Dyscalculia? What? Ideas, hivemind! [more inside]
posted by spinifex23 on Mar 10, 2012 - 28 answers

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