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927 posts tagged with math.

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## Next step beyond Lego?

My son has mostly outgrown Lego but still loves building things from instructions. Challenging things. What are some building kits I could get for him? [more inside]

## Math Educators: Is there a name for this?

My eight year old has devised his own way of doing subtraction with re-grouping and it makes me wonder if this is a known "wrong" way of doing things that is part of the "normal" learning process, such as the way that many children write letters backwards and it doesn't necessarily mean anything, or if it is more unusual. For what it's worth, his teacher, who has a masters degree in mathematics herself, has not seen a child do things this way before. [more inside]

## Do I need to crash a high school stats class?

Where do English majors go to learn key principles behind

**deriving mathematically sound meaning from data**? I worked for years as a digital editor. Now I'm a "content strategist," which means I'm responsible for proving my new strategy increases reader engagement via different metrics like UVs, shares, attention time, average story finish rate, etc. I'm very familiar with platforms like Google Analytics and Chartbeat. But I want to learn how to see patterns in them there numbers, and I NEED to make sure my insights are mathematically accurate. How can I most efficiently do that without getting a brain transplant? (Example below.) [more inside]## Add learning disorder, subtract job

I have a learning disorder called and as a result my math skills are somewhere around a 4th grade level. I can't turn a 3d into a 2d drawing or vice versa and I really can't count money but for going painfully slow.
Since I graduated high school I've been looking for a job that I could do where my cognitive function deficits will cause problems keeping the job. So far, lots of odd jobs and low-end jobs with nothing more solid or long term (or better paying). I've thought about going back to school but almost everything requires some kind of math or chemistry.
I like working with my hands but my difficulty with math means that doing things like welding (which I trained for) are out because I can't handle the numbers.

## Mathematical permutations

I've gotten multiple answers to this question, so I'm coming to the good folks here for consensus!
Given an 8 character string, where each character can be one of 31 different potential values, how many different unique combinations can you create (with the supporting mathematical explanation and reasoning)? [more inside]

## Can an exact measurement ever be statistically insignificant?

I am dubious of a colleague’s assertions about statistics. [more inside]

## Godel, Escher, Bach: worth it?

Is it a waste of time for me to even attempt to read

*Godel, Escher, Bach*when I don't have a very good foundational knowledge of math? [more inside]## What was this "monster" math game from the early 2000s called?

As I was using Picmonic for gross anatomy, I was reminded of a computer game our sixth-grade math class played back in 2002 or 2003. The main characters were "monsters", and to advance in the game, you had to answer math-related questions. I seem to remember the name of the game starting with "Z"? I could have sworn it was "Zoonies", but the only results I get are for a Nintendo DS game. Our computers were Macs.

## Does math homework help middle-school kids learn and retain knowledge?

Does giving math homework really help middle-school aged kids (11 to 13 years old) with learning and retention? Is "practice makes perfect" really a thing with pre-teen learners? Are (or were) you a middle school math teacher? If so, do you give homework? If so, how much and what kind? And what were your outcomes? [more inside]

## Did I sell myself short?

I'm currently in the very very early research stages of making a career change and I'm starting to think that I sold myself short in regards to my education. I have a Bachelor of Arts in History and, well, I've really been struggling to find "my place" in the career world for the last 5 years. I'm starting to think I sold myself short by not pursuing more math/science related careers. Is it too late for me to maybe find a career in STEM I would enjoy? [more inside]

## Typer Shark for Algebra?

I want to take a pre-calculus class, but I’m not prepared.
I would find it easier to prepare with some kind of program or system to refresh my math skills and learn some of what I missed in high school. I, like most mammals, am motivated by immediate rewards. Is there an online game where the math gets progressively harder and you earn rewards for completing problem sets? I was more willing to practice typing when I was defeating sharks than when I worked from a book. Does such a gamified system exist for math? [more inside]

## How to Math

I'm a computer science major in college. I'm not a freakin' genius, but I do well-- get A's in my classes, good with abstraction (e.g. pointers), etc. However, I seem to have missed... my entire high school pre-Calculus math curriculum? I don't know. [more inside]

## Learning To Read Mathematical Notation?

I do not have a math background, but I have been learning statistics for work and while I understand the concepts, I am having a really hard time reading mathematical notation (proofs, formulas, etc). It feels like I missed the 101 class in reading the language of mathematics.
Are there particularly good resources out there on reading Mathematical Notation?

## Fano Plane and Hexagonal Tiling - a deep connection or a shallow one?

I've been chewing on the Fano plane a lot these last few weeks, and have just noticed something that seems really interesting to me. Notably, that the seven lines of the plane map very nicely to the 7-color hexagonal tiling. [more inside]

## The Best Historical, Educational, or Informational YouTube Channels?

I'm looking for YouTube channels that are dedicated to providing education about or insight into interesting subjects. They can have humor in them, but I'd prefer for them to be primarily informative rather than humorous. [more inside]

## How to self-study science from textbooks like a boss?

I'm an (older) grad student doing research in applied physics. I've ticked all my class requirements but have a shortlist of subjects I feel would be useful to my research and my career. I've translated these into a list of reputable, recommended textbooks to read.
I've started reading those, usually in the evenings after all daily tasks are complete, and I enjoy it very much - but does anyone have tips to maximize the payoff of those reading hours? [more inside]

## More self-confidence for approaching games and puzzles

I've reached the proverbial straw moment where I'm realizing that, approaching any sort of numbers/critical thinking game or challenge that is meant to be fun, is instead filling me with absolute dread. I find myself becoming incredibly tense and anxious, and very often preemptively angry at myself for OF COURSE being too stupid to pick it up, which means that often I don't even try to pick it up, which then becomes an inescapable feedback loop. I need to change this, please tell me how! [more inside]

## Help me create a player ranking system for a game

I want to create a ranking system for a game that will be more refined than just ranking the users in order 1, 2, 3, etc. [more inside]

## Math equation problem

Asking for a friend:
I have a question about how to work out a student's exam mark.
Unit 1 is worth 60%, Unit 2 is worth 40%. Both units are marked out of 80. For example, a student scores 67/80 on unit 1 and 69/80 on unit 2. What is their overall mark?
Thanks for any help!

## Is there a name for this shape?

What would you call the shape of the two-dimensional outline of the two stones (cabochons) circled in red in this picture? [more inside]

## My Math/Excel Ignorance is Showing

In three cells in a single column in Microsoft Excel, I'd like to be able to input a number in the bottom cell, have the middle cell calculate what a 6% sales tax on the figure below it is, and provide the amount before that 6% tax in the top cell.
Any help will be appreciated. The last math class I took was 44 years ago and I didn't pay much attention in that one.

## Anything like the Harvard Extension School in the DC area?

I’m likely relocating to Washington DC this summer and I'm looking for somewhere where I can take Linear Algebra and a few other undergraduate math and statistics classes in Fall 2015 and Spring 2016 as a non-degree student. [more inside]

## The Mathematics Of Time

So I have a few years to kill and I'd like to spend them fully understanding what physicists and mathematicians know about time. I'm not looking for any sort of summary, I want to understand the math from the bottom up. I once caught my father going through the

*Annus Mirabilis*papers with a red pen; that's the sort of proficiency I have in mind. [more inside]## Am I doing compound interest wrong?

I'm hoping Metafilter can help me with a stupid math question, but one that's bothering me about how I was taught to compound interest versus some numbers I'm reading/hearing online about a Supreme Court case. [more inside]

## Exorcizing the devil from the details

I'm currently studying undergraduate math and though the concepts are clear, I lose a lot of marks through carelessness or small errors. Please help me pick up on/avoid these better. [more inside]

## Business math word problem: calculating salary through "growth tiers"

I'd like some help coming up with a formula for calculating annual salary increases. The idea is that a given job description will have two "growth tiers", through which an employee's salary will increase at different rates, and beyond which their salary cannot increase further (except for cost-of-living adjustment). There's also a "base growth factor", which is determined by individual employee performance--e.g. 10% for a stellar employee, 6% for a good employee, etc. Lots more inside. [more inside]

## Books/review of high school math for former math major, current tutor

I need book recommendations two categories:
1) for myself for review (that are somewhere between high school text books and Spark notes)
2) just straight up textbooks for high school math (algebra i, geometry, algebra ii, trigonometry, pre-calculus) [more inside]

## Looking for a blogging platform that handles equations and code

My friend and I are starting an academic blog. We will be posting equations and code snippets (mostly MATLAB), and are looking for a blogging platform that will allow us to enter them easily and display them nicely. Do you have any suggestions on what we should use?

## How can I quantify these fitness scores?

Hey math/fitness nerds. I'm working on a pet project. I'm trying to quantify general fitness levels across a population based on a few different scores. I have the tests, but need help setting up the values of each score. [more inside]

## Something more interesting than :(){ :|:& };:

What are some fun, computationally intensive tasks for my new computer to do? [more inside]

## Probability distributions and their practical applications

I am looking for a resource that lists probability distributions and their common real-world applications. For example, I'd expect to see: Lognormal - daily returns in the stock market. Poisson - failure rates for mechanical equipment, ... [more inside]

## Help me do some math?

Help me do some math? [more inside]

## Keeping on top of the snowstorm -- does it really matter?

I am in the snowy state of Massachusetts and avoiding my next foray out to shovel. Plus, spouse and I slightly disagree on how often we really need to go out and shovel. Does it really save time to shovel every few hours throughout the storm? I have a suspicion that it doesn't really save time, and that we be just as fine waiting until the end of the snowstorm -- is there a way to think this through mathematically to find a good answer?

## Giant numbers (Ex: how many primes are smaller than the largest known?)

Many sites say that the largest known prime is "2^57,885,161 − 1, a number with 17,425,170 digits." Given this and well known research about the density of primes, I think it's at least possible to estimate the number of primes between 1 and 2^57,885,161 − 1. But I don't know how to do this myself.
I really want the answer to this one (the order of magnitude at least), but I've got lots of these, and I'd ideally like more cool ones. :) [more inside]

## Double checking math for the gaslit

A math problem followed by an issue with the boss. [more inside]

## Learning math online

I want to learn math. I signed up for Khan Academy and I like the format a lot. I really like that there are short lessons that I can complete, and that the software automatically checks the answers and lets me continue when I completed a string of 5 good answers in a row (or something similar). I don't like the video explanations though. I'm just not a video person, I learn much better from text. Is there something like Khan Academy where you can do math exercises online but where the explanation is in text?

## I know enough calculus to think of the question but not the answer

You want to walk 10 blocks north and 10 blocks east. It would be shorter to walk along the hypotenuse, but the same distance to walk 1 block north, then 1 block east, then 1 block north, etc. it seems that if the blocks were infinitesimally short, it would approximate the hypotenuse, but alas, walking 10 blocks in one direction and then 10 blocks in the perpendicular direction is the same as dividing it up. What gives?

## How do I draw like MC Escher?

I'd like to understand how Escher made his architectural illusion drawings so I can model similar environments in 3D and then use those models to draw my own creations out on paper. How do I even get started? [more inside]

## Sesame Street has me flummoxed

Sesame Street, when naming parts of shapes, consistently talks about the number of sides and the number of angles. For example a hexagon has six sides and six angles. This makes me crazy. I thought the pointy parts were "corners" or something like that. Doesn't a shape have infinite angles? If any three points can form an angle? Does 180 degrees not count as an angle? Isn't corner a more precise word?

## How to Tell Excel to Evaluate Last Three Months (NOT Last 90 Entries)

I have an Excel spreadsheet I use to track glucose readings. There’s a value diabetics use called “A1C” which looks at the last three months of readings. It's based on a blood test, but can be estimated by averaging your readings for the last three months. I try to track every day, but I can’t reliably say “look at the last 90 values” – so I’m wondering how to set up a formula to tell it to only look at readings going back 90 days, not necessarily 90 readings. More inside. [more inside]

## Chaos Theory Explained for Non-Math People?

My curiosity whetted by the first few paragraphs (and double pendulum illustration) of the Wikipedia entry, I want to learn as much and as deeply about chaos theory as possible without needing to know mathematics. Also interested in philosophical implications. Videos? Books or apps or web sites? My math may be weak, but I'm otherwise intelligent, so I'd prefer something much more thorough than, say, "Through the Wormhole" (I realize the math limitation's a huge hindrance, though).

## Multiplication and division resources for a 1st grader

My first grader is asking about multiplication and division. Where do I start? [more inside]

## Netherlands Master's in education vs teaching experience in Asia, which?

I have a B.Sc in computer science and have one year of experience English using my CELTA qualification. Looking around, I see a lot of requests for people with North American B.Sc's to teach Math/Physics/CS in Asia. I'm trying to decide whether to go and start teaching, or whether it is better to get a state teaching qualification (2yr) in the Netherlands first... [more inside]

## Help me solve this real-life math problem.

I need to use math to figure out how to fill my pill organizer correctly. [more inside]

## Can't scribe, want to do math

Entering old age I want to revisit undergraduate mathematics from decades ago. In this plan (fantasy?) I will go through text books & web sources to replicate and extend what I once knew (or what I think I knew!). The problem: a slight finger tremor (nothing lethal or degenerate) makes writing difficult and borderline illegible, even to me. [more inside]

## Bar Crawl Planning + Math = Happy Drunks!

I am currently planning a bar crawl and could use some help.
There are 6 groups and 6 bars. Each group will start at a different bar (Stop 1). Each group will then meet up with a different group at Stop 2, Stop 3, etc., totaling 6 stops. Each group will need to meet each other group one time. Ideally, no group would repeat a bar, ie. each group will meet each other group and hit all 6 designated bars.
I've been trying to manually chart this and I'm pulling my hair out. Is there a way to figure this out with math or some other voodoo that I'm not aware of?

## Numbers to Words

I want a plain text file listing the English words for number 1-100 (ideally, one per line any delimiter will be fine, I can fix that). One, Two, ..., One Hundred. It's got to be somewhere on this great internet. Can AskMe find it

**fast**?## How do I solve for a percentage of a total budget...

This will be easy for someone, but math is my second language so I'm at a loss.
How do I solve for the percentage of a TOTAL budget, when one line item is unknown (and is part of the total budget)? [more inside]

## Online resources for brushing up on basic math skills?

What are some good, free online resources for an adult who needs to brush up on basic math operations such as working with fractions, percentages and ratios? Other than Khan Academy. The more interactive the better.

## Does it ever make sense to get a second undergrad degree?

Ages ago, I posted this question. Sadly, I'm still stuck in pink collar admin hell and still looking for a way out. I'm not interested in climbing the ladder to get past the admin assistant jobs - I want to get away from this world altogether. More education seems like the only option, but my terrible undergrad record means that graduate school is out. [more inside]