870 posts tagged with math.
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lead lead everywhere

California has a new law that specifies limits for lead in jewelry products. Even though the answer to my question should be a no-brainer, I need to confirm: [more inside]
posted by edjusted on Dec 21, 2007 - 10 answers

How can I round prices in Excel?

In Excel 2007, I need advice on how to round a series of prices to either a $0.50 ending, or a $0.95 ending. [more inside]
posted by Futurehouse on Dec 20, 2007 - 10 answers

How many rolls 'till n values in a row.

Given a fair die with s sides, what is the expected number of rolls r before I get o outcomes with the same value v in a row? [Note this is emphatically NOT a homework problem; I just really want to know, feel like I should be able to figure it out, can't, and it is driving me nuts.] [more inside]
posted by lucasks on Dec 19, 2007 - 30 answers

Help a first-time tutor get started!

FirstTimeTutorFilter: I'm plan to start tutoring Math, Chemistry, Physics and possibly ESL in January. Only problem is, I have *no idea what I'm doing*. Anyone have any textbooks, general teaching books, online certification courses, etc to recommend? [more inside]
posted by anonymoose on Dec 17, 2007 - 8 answers

Rainy day math problem!

How many different conversations can six people have? [more inside]
posted by keasby on Dec 13, 2007 - 18 answers

Tips for university teaching

Teaching a university course for the first time: any tips or suggestions? [more inside]
posted by onoclea on Dec 12, 2007 - 33 answers

What is bigger than alot or a shitload?

My son asked me how many trees there are in the world. I know there are a finite number, yet I also know that it is not practical to count them. Same with grains of sand. When the set cannot be measured because it goes on forever we say the set is infinite. Is there a single word to express the concept of a countable, finite number too large to actually count? [more inside]
posted by JohnnyGunn on Nov 30, 2007 - 42 answers

Make a function of this graph. That's like an anti-graph!

Help me create a function from a graph, details inside. [more inside]
posted by hammerthyme on Nov 22, 2007 - 6 answers

Parts Per Hundred or Parts Per One?

What is the TERM for the three-decimal place, fraction-of-one "percentage" format used in baseball statistics? [more inside]
posted by rokusan on Nov 20, 2007 - 15 answers

Long time listener, first time caller

I'm failing Trig. What would be a good makeup assignment to suggest to my teacher? Do college teachers even do that kind of thing? [more inside]
posted by malapropist on Nov 14, 2007 - 21 answers

Why the inconsistent derivatives?

Where am I going wrong with this (very simple) implicit derivative? [more inside]
posted by PuGZ on Nov 3, 2007 - 3 answers

How to scale corner radius based on a logarithmic scale

Is there a method that exists for defining corner radius on a drawn box in Illustrator which scales proportionality based on a logarithmic scale that is directly related to the size of the box. [more inside]
posted by tmgstudio on Oct 29, 2007 - 4 answers

Help me prove to myself that I am capable of passing a basic Calculus course!

Where can I take (or simulate taking) a basic calculus course for free or cheap. I don't care about credits or anything, I just need to defeat calculus. This time, it's personal. [more inside]
posted by dumbledore69 on Oct 25, 2007 - 14 answers

#2 pencil - 20 years = x qty remedial math classes

Bonehead Math Filter: What sort of math is on the NJ College Basic Skills Placement Test [more inside]
posted by dancinglamb on Oct 23, 2007 - 8 answers

I feel like I dont know you anymore, math.

How do I make the transition, in my brain, to studying graduate/advanced mathematics? [more inside]
posted by milestogo on Oct 22, 2007 - 20 answers

Me need mor math and chemistry

Does anyone know of any one-year science-ish programs for those who have a bachelors, but who want to bulk up on science and/or math. [more inside]
posted by melissam on Oct 21, 2007 - 6 answers

Inequalities and direction-flipping

Why is it that when I solve the inequality 0 ≤ arccos(x) <> cos(π/4)? Why do the operators switch direction? [more inside]
posted by PuGZ on Oct 19, 2007 - 11 answers

mathematics chess book?

is there a book on the mathematics of chess? [more inside]
posted by randomizer on Oct 18, 2007 - 6 answers

Does the study of math sharpen critical thinking skills?

If a man’s wit be wandering, let him post a question about mathematics and reasoning to MetaFilter. [more inside]
posted by jason's_planet on Sep 25, 2007 - 20 answers

Details of the German Tank Counting Method.

Details of the German tank counting method (as seen on reddit)? [more inside]
posted by tehgeekmeister on Sep 19, 2007 - 13 answers

Difficult as ABC

ABC x D = BADC. What single numbers (1-9) do the letters represent? Is there any way to arrive at the answer (a) by logical deduction all the way rather than with some trial-and-error and (b) so that a 10-year-old can follow the logic? [more inside]
posted by londongeezer on Sep 16, 2007 - 15 answers

looking for a sign

Is there a symbol for the phrase "and/or"? [more inside]
posted by jak68 on Sep 15, 2007 - 19 answers

It felt like I cheated...

How do I solve this puzzle mathematically, rather than programmatically? [more inside]
posted by anomie on Sep 13, 2007 - 12 answers

We Don't Need No Stinking Derivatives

Obscure Mathfilter: In the arcane past of mathematics, there is something known as a "Newton Polygon", which theoretically can be used to help sketch functions of two variables, say, x^3 + y^3 =3xy, for instance. But -- [more inside]
posted by wittgenstein on Sep 13, 2007 - 4 answers

Question about Number Theory Text

Question about Hardy's "An Introduction to the Theory of Numbers". [more inside]
posted by tehgeekmeister on Sep 12, 2007 - 9 answers


I want to start teaching myself physics, but how? [more inside]
posted by god particle on Sep 11, 2007 - 12 answers

Favorite Integral Tables?

What's your favorite math reference book, specifically for integrals? [more inside]
posted by kiltedtaco on Sep 5, 2007 - 13 answers

I need to learn basic to fairly advanced Math and English and I'm somewhat of a rookie who is taking action. Help!!

I'm looking to rebuild my mathematics skills from the ground up so that I have proper habits. I'm looking to start from the basics and go straight up to calculus. Math was a subject in which I didn't pay as much attention to as I wish that I had and am looking to find the best sources of information on the subject. I also would love software that would drill me kind of like speed reading software but for math. [more inside]
posted by Chamunks on Sep 4, 2007 - 22 answers

What are some fun math problems with integer answers from 0-18?

What are some (easy to moderate difficulty) math problems with integer answers ranging from 0-18? I'm making mathematical seating cards where guests will solve a problem to find their table number. [more inside]
posted by Alison on Aug 30, 2007 - 25 answers

Solve this math puzzle. Then explain it to me.

Math puzzle filter. How do you go about solving this puzzle? [more inside]
posted by batcrazy on Aug 28, 2007 - 25 answers

math-challenged needs formula to constrain images for php + gd image manipulation

I need a formula or actual php code to generate a new height and width that will constrain the image between a maximum height and a maximum width while retaining the correct proportions of the original image. [more inside]
posted by sjarvis on Aug 13, 2007 - 10 answers


Maximal volume of an ellipsoid... [more inside]
posted by Blazecock Pileon on Aug 7, 2007 - 15 answers

Formulas for Food

Looking for math formulas involving food. [more inside]
posted by JaySunSee on Aug 4, 2007 - 5 answers

6.08 seconds = $165.50

Does anyone have any data for human error while operating a timing device? Litigeous details and much [more inside]
posted by jmugrapler on Aug 3, 2007 - 31 answers

Lotto Odds!!

Statistics/Lottery question; Please settle this argument between a friend and I about the Florida state lotto. [more inside]
posted by boyinmiami on Aug 2, 2007 - 26 answers

Books on survey design and analysis?

I'm looking for books on survey design and statistical analysis. [more inside]
posted by crazycanuck on Jul 31, 2007 - 4 answers

math-and-logic-filter: only two more floors - I'm almost there! or am I?

math-and-logic-filter: only two more floors - I'm almost there! or am I? [more inside]
posted by krautland on Jul 20, 2007 - 31 answers

Memorizing Math Formulas

Any tips or tricks to memorizing financial math formulas [more inside]
posted by JaySunSee on Jul 16, 2007 - 11 answers

Seeking reading material before jumping into a master's in applied math...

Starting this fall, I plan on taking some preparatory undergrad coursework with the intention of eventually applying to a master's program in applied mathematics. I am seeking suggestions for reading material concerning the field of mathematics in general, both as a refresher and as insight into current focus areas and work being done. As a working engineer, my situation and background might be a bit different from most considering this route... [more inside]
posted by Bugg on Jul 15, 2007 - 2 answers

¿¿why so trippy??

What kind of interference-pattern phenomenon have I got going on here? [more inside]
posted by garethspor on Jul 8, 2007 - 8 answers

Help me make the graph my boss imagined!

Graphing question: My boss has an idea of how our data should be presented. Please help me figure out how to make it happen! [more inside]
posted by nprigoda on Jul 4, 2007 - 5 answers

Math Problem

Arby's is better at math than me... [more inside]
posted by jjbb on Jul 3, 2007 - 28 answers


Ask Mathfilter: I want some good math sites to read. A math-cetric Metafilter or Cosma's notebooks. [more inside]
posted by tylermoody on Jul 2, 2007 - 11 answers

Join some of the dots, throw the rest away

Map geeks: can I generate a polygon shapefile from the outline of a large collection of points? There's more detail, of course. [more inside]
posted by genghis on Jun 26, 2007 - 17 answers

Statistics: tell me about r-square for nonlinear models

StatisticsFilter: Can someone explain - with examples - why R^2 (r-square) values are not appropriate for use with non-linear regression models. [more inside]
posted by jonesor on Jun 21, 2007 - 5 answers

Dyscalculia Schools

What schools in the US will waive math requirements for people with dyscaculia? [more inside]
posted by SansPoint on Jun 19, 2007 - 16 answers

How to write a mathematics paper

I need to write a document with a lot of algebraic formulas. What word processor / page layout program would make this quickest and easiest? [more inside]
posted by rolypolyman on Jun 18, 2007 - 25 answers

Mystery Equation

Mystery Equation: x2+y2=(1-z)z4 A friend of mine has a bet regarding whether anyone can figure out what it represents. It's supposed to be mildly romantic. Ideas?
posted by Firas on Jun 16, 2007 - 30 answers

Sock quality modelling and optimisation?

Let's say I buy s socks. Now, these socks feel the very best (have a quality factor of 100) after f wearings, and must be discarded (have a quality factor of zero) after f × 100 wearings. I want to add these socks to a pool from which I draw two daily, and want to maximise the probability of selecting socks with the highest quality over the life of the pool... [more inside]
posted by TheNewWazoo on Jun 14, 2007 - 24 answers

Donald in Mathmagic Land

I want to find an online version of "Donald in Mathmagic Land." [more inside]
posted by inconsequentialist on Jun 10, 2007 - 9 answers

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