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Jul24-14 10:02 AM Greg Bernhardt 
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Test your skills. Math challenges will be posted at least once a week. Suggestions for problems are welcomed.
Aug5-14 02:05 PM fredoniahead 
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All math courses. PDFs, tutorials and web links.
Sep15-14 01:06 PM phion 
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Jan16-12 Greg Bernhardt
Please post any and all homework or other textbook-style problems in one of the Homework & Coursework Questions...
Feb23-13 09:23 AM
1 39,237
Hi! I've got a couple of questions about Sudoku. 1. How many possible Sudoku boards are there? That is, a 3x3...
Oct8-05 07:13 PM
0 1,342
Hi! I was thinking about primes and have a bit of a question. I apologize if this is too easy or obvious -- I...
Mar25-07 04:47 PM
Moo Of Doom
3 1,300
Hi! I've been dealing with a situation like this for a couple of years now and it made me start thinking... A...
Feb23-09 08:19 PM
4 1,454
Hi! The Red Sox just finished an 11-game winning streak, which made me wonder. Do most teams experience winning...
Apr29-09 11:37 AM
3 3,665
SO the entrance to a college is based off of two factors: 54% grade point average, and 46% supplemental application....
Aug31-11 10:39 AM
7 3,698
Heres two problems from an A Level related paper: prove that if pq is irrational then atleast one of p or q is...
Oct17-11 04:20 AM
4 2,917
I dont understand the concept (or need for) of vacuous truths/implications. Why is it that if say a statement a is...
Nov10-11 01:38 AM
43 4,852
It seems to me (though I would be *extremely* glad to be proven wrong here) that in mathematics we often blindly...
May30-12 07:06 PM
15 2,748
Hi, I was just reading up on some material for one of my exams and came across something. I realize this may seem...
Dec11-06 04:32 AM
9 1,383
if given two points each with different x and y coordinates, what is the best way to define the error between these...
Jul12-07 01:24 PM
matt grime
4 993
Why is it not possible to have the log of a negative number? Examples would be greatly appreciated. Furthermore,...
Oct4-13 08:06 AM
2 663
Hi!!! im amateur in mathemathicals growth models but im doing my graduated work in adjust five differents models in...
Jan28-11 10:13 AM
3 654
Is the statement -1<1/0<1 decidable using the ordered field/real number axioms and first order logic? I have tried to...
Sep3-08 05:36 PM
ad infinitum
5 1,848
I'm stumped as to how to find a formula for the number of pairs QN*QN between 1 and p-1. I must use the following as...
Apr28-03 01:18 AM
Ad Infinitum NAU
7 1,581
You have 10 days of numbers that are averaged together (10 day avg). The most recent 3 days of numbers also averaged...
Aug5-08 05:20 PM
2 1,320
Hello All, I need help making sure I am right about this. Say for example I have these two functions: f(n) = 2^n and...
Sep22-08 02:07 PM
5 857
Can anyone give me examples of "infinity" in the physical world around us? Ie. evidence of its existence as more than...
Dec9-03 04:34 PM
19 2,011
I first read this story in New Scientist when I was collecting it. Here are some highlights: The article has...
Dec5-03 06:23 PM
4 1,403
Hi Folks. I was hoping to pick the brains of some of the mathematicians and mathematically inclined on this site. ...
Mar18-11 07:02 AM
8 3,680
if i integrate d/dx(x^2), should i include the constant of integration? thanks
Feb4-05 11:56 AM
4 1,094
this is quite a classic problem i think but im having difficulty finishing it off. If we have two stamps of positive...
Feb10-05 11:24 AM
robert Ihnot
4 1,203
does any one know a proof for the solution to the frobenius problem for n=2? that is, that the smallest not possible...
Feb10-05 06:06 PM
3 952
hey, i was just wondering if anyone could help find the sum of the infinite series defined by 1/. I can split it into...
Nov2-09 03:10 PM
14 18,812
if we know that an infinite series is convergent from an integer T, to infinity, then the series is convergent from 1...
May13-05 02:18 AM
4 1,080
if you are given f(x,y)=x^2+y^2 and y=cos(t) x=sin(t), then when you differentiate f with respect to t, you use the...
May15-05 09:17 AM
14 1,202
Suppose you are conducting a hypothesis test to compare two sample means from independent samples, with the variance...
May23-05 12:01 PM
2 40,828
Hi everyone, I'm working with an online graphing program It's great, and actually tons of fun. I'm...
Apr3-14 09:00 PM
Simon Bridge
7 574
I feel like a total noob, but my friend is reviewing distance formula and asked for my help. I can't seem to get the...
Aug28-12 09:55 AM
6 1,171
Hi there, I have a question regarding this statement: My question is...
Jun22-12 06:46 PM
5 1,064
Dear All, Currently I'm working out a formula for Destroyers in the online game BattleGround Europe to be able to...
Aug23-06 03:53 PM
15 1,498
Dear All, After the great help I received last time I couldn't think of a better place to be asking this question....
Aug28-06 06:19 AM
2 2,303
Hi, I'm looking for a recommendation for a good textbook which will deepen my understanding of...
Jun17-07 05:56 AM
5 3,020
Hi, Just reading through a good physics book about games and came across some stuff on complex numbers. The book...
Jul3-08 07:34 PM
14 1,940
Hi!, I'm well into the world of computer graphics. Love to say it was great but well, it isn't. I would like to...
Jul31-10 10:22 PM
1 774
I want the 1st, 2nd and 3rd derivatives of the following seven parameter double sigmoid function Y = a + b /(1 +...
Jan26-12 11:58 PM
Ade Solm
0 1,177
I have a test tomorrow and there are 2 question I am stuck on Five patrons check their coats at a theatre. In the...
Dec2-03 08:24 AM
1 1,517
Im not sure if this is the right place, but I have an optimization problem where I assume we are supposed to use the...
Dec16-05 11:03 PM
3 1,763
Hi, I have this double summation expression to solve as part of matlab code I am writing. I have searched matlab no...
Feb24-12 05:03 PM
5 6,144
Hi, Please I need your assistance on this matlab code. I will really appreciate it. R=0.492; Pw=0.3708; for...
May2-12 12:54 AM
4 4,207
Hi, Please assist, I write this matlab function and receive the error below function...
May16-12 07:03 AM
1 1,023

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