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855 posts tagged with math.

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## 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]

## 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]

## mathematics chess book?

is there a book on the mathematics of chess? [more inside]

## 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]

## Details of the German Tank Counting Method.

Details of the German tank counting method (as seen on reddit)? [more inside]

## 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]

## looking for a sign

Is there a symbol for the phrase "and/or"? [more inside]

## It felt like I cheated...

## 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]

## Question about Number Theory Text

Question about Hardy's "An Introduction to the Theory of Numbers". [more inside]

## Fizzix

I want to start teaching myself physics, but how? [more inside]

## Favorite Integral Tables?

What's your favorite math reference book, specifically for integrals? [more inside]

## 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]

## 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]

## Solve this math puzzle. Then explain it to me.

Math puzzle filter. How do you go about solving this puzzle?
[more inside]

## 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]

## Bubbles

Maximal volume of an ellipsoid... [more inside]

## Formulas for Food

Looking for math formulas involving food. [more inside]

## 6.08 seconds = $165.50

Does anyone have any data for human error while operating a timing device? Litigeous details and much [more inside]

## Lotto Odds!!

Statistics/Lottery question; Please settle this argument between a friend and I about the Florida state lotto. [more inside]

## Books on survey design and analysis?

I'm looking for books on survey design and statistical analysis. [more inside]

## 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]

## Memorizing Math Formulas

Any tips or tricks to memorizing financial math formulas [more inside]

## 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]

## ¿¿why so trippy??

## 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]

## Math Problem

Arby's is better at math than me... [more inside]

## math

Ask Mathfilter: I want some good math sites to read. A math-cetric Metafilter or Cosma's notebooks. [more inside]

## 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]

## 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]

## Dyscalculia Schools

## 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]## Mystery Equation

Mystery Equation:

**x**A friend of mine has a bet regarding whether anyone can figure out what it represents. It's supposed to be mildly romantic. Ideas?^{2}+y^{2}=(1-z)z^{4}## 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]## Donald in Mathmagic Land

I want to find an online version of "Donald in Mathmagic Land." [more inside]

## Two spheres colliding

Help me with the math of two spheres colliding [more inside]

## Why do I hate 8?

Why is it hard for me to perform simple mental calculations with certain numbers? [more inside]

## To doublemajor or not to doublemajor?

I'm a math major, but dont know exactly what I want to do. Should I also major in Physics? Economics? [more inside]

## Equation solving help for the intellectually challenged

(x + y)-(x*y)=79. What are x and y? [more inside]

## Help me get up to speed with Matlab.

What are the best online and offline learning materials for Matlab? [more inside]

## How to administer a read-aloud math test

Suggestions/resources for administering a math test out loud? [more inside]

## Equal and Opposite Reaction?

Physics: Difference between two people pulling on each end of a rope, and one person pulling on a rope tied to a tree. [more inside]

## Math help for the right brained

I have a math question involving combinations and sets. [more inside]

## To leading order?

In the context of information theory, what does "to leading order" mean? [more inside]

## Algorithm to display a schedule calendar with specific constraints

I've charged with adding a feature to a shift scheduler / coverage requestor that displays shift information for a given week. I've been able to display them so as to satisfy the constraints I've been given, but it's got me wondering wondering if there's a more rigorous/mathematical approach to the general problem of organizing the display of any such calendar information. [more inside]

## Puppets no can read good?

I need help writing a puppet show to teach the importance of literacy to kids k-5. [more inside]

## i need a good stat textbook for self study.

i've been looking at reviews on amazon for introductory stat textbooks, and i can't seem to find a single one that doesn't have blatantly contradictory reviews. [more inside]

## Tower....to the moon!

Math Question Kinda: I realize it's not possible. But if it was....how tall would the structure need to be if it were to be seen from both US coasts. Or is it impossible because of the curvature of the earth or whatever else I'm not thinking about it. [more inside]

## Calculate length of a pipe from the volume it holds

How long would a 3/4 inch inner diameter pipe need to be to hold exactly 27 gallons of water? [more inside]

## How to know if two proportions are statistically significant?

How do I determine whether the difference between two or more proportions is significant? [more inside]