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Tech support and questions about AoPS classes and materials
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Site Support Tech support and questions about AoPS classes and materials
Tech support and questions about AoPS classes and materials
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k a May Highlights and 2025 AoPS Online Class Information
jlacosta   0
May 1, 2025
May is an exciting month! National MATHCOUNTS is the second week of May in Washington D.C. and our Founder, Richard Rusczyk will be presenting a seminar, Preparing Strong Math Students for College and Careers, on May 11th.

Are you interested in working towards MATHCOUNTS and don’t know where to start? We have you covered! If you have taken Prealgebra, then you are ready for MATHCOUNTS/AMC 8 Basics. Already aiming for State or National MATHCOUNTS and harder AMC 8 problems? Then our MATHCOUNTS/AMC 8 Advanced course is for you.

Summer camps are starting next month at the Virtual Campus in math and language arts that are 2 - to 4 - weeks in duration. Spaces are still available - don’t miss your chance to have an enriching summer experience. There are middle and high school competition math camps as well as Math Beasts camps that review key topics coupled with fun explorations covering areas such as graph theory (Math Beasts Camp 6), cryptography (Math Beasts Camp 7-8), and topology (Math Beasts Camp 8-9)!

Be sure to mark your calendars for the following upcoming events:
[list][*]May 9th, 4:30pm PT/7:30pm ET, Casework 2: Overwhelming Evidence — A Text Adventure, a game where participants will work together to navigate the map, solve puzzles, and win! All are welcome.
[*]May 19th, 4:30pm PT/7:30pm ET, What's Next After Beast Academy?, designed for students finishing Beast Academy and ready for Prealgebra 1.
[*]May 20th, 4:00pm PT/7:00pm ET, Mathcamp 2025 Qualifying Quiz Part 1 Math Jam, Problems 1 to 4, join the Canada/USA Mathcamp staff for this exciting Math Jam, where they discuss solutions to Problems 1 to 4 of the 2025 Mathcamp Qualifying Quiz!
[*]May 21st, 4:00pm PT/7:00pm ET, Mathcamp 2025 Qualifying Quiz Part 2 Math Jam, Problems 5 and 6, Canada/USA Mathcamp staff will discuss solutions to Problems 5 and 6 of the 2025 Mathcamp Qualifying Quiz![/list]
Our full course list for upcoming classes is below:
All classes run 7:30pm-8:45pm ET/4:30pm - 5:45pm PT unless otherwise noted.

Introductory: Grades 5-10

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Mon, Tue, Wed & Thurs, Jun 23 - Jun 26 (meets every day of the week!)
0 replies
2 viewing
jlacosta
May 1, 2025
0 replies
k i Adding contests to the Contest Collections
dcouchman   1
N Apr 5, 2023 by v_Enhance
Want to help AoPS remain a valuable Olympiad resource? Help us add contests to AoPS's Contest Collections.

Find instructions and a list of contests to add here: https://artofproblemsolving.com/community/c40244h1064480_contests_to_add
1 reply
dcouchman
Sep 9, 2019
v_Enhance
Apr 5, 2023
k i Zero tolerance
ZetaX   49
N May 4, 2019 by NoDealsHere
Source: Use your common sense! (enough is enough)
Some users don't want to learn, some other simply ignore advises.
But please follow the following guideline:


To make it short: ALWAYS USE YOUR COMMON SENSE IF POSTING!
If you don't have common sense, don't post.


More specifically:

For new threads:


a) Good, meaningful title:
The title has to say what the problem is about in best way possible.
If that title occured already, it's definitely bad. And contest names aren't good either.
That's in fact a requirement for being able to search old problems.

Examples:
Bad titles:
- "Hard"/"Medium"/"Easy" (if you find it so cool how hard/easy it is, tell it in the post and use a title that tells us the problem)
- "Number Theory" (hey guy, guess why this forum's named that way¿ and is it the only such problem on earth¿)
- "Fibonacci" (there are millions of Fibonacci problems out there, all posted and named the same...)
- "Chinese TST 2003" (does this say anything about the problem¿)
Good titles:
- "On divisors of a³+2b³+4c³-6abc"
- "Number of solutions to x²+y²=6z²"
- "Fibonacci numbers are never squares"


b) Use search function:
Before posting a "new" problem spend at least two, better five, minutes to look if this problem was posted before. If it was, don't repost it. If you have anything important to say on topic, post it in one of the older threads.
If the thread is locked cause of this, use search function.

Update (by Amir Hossein). The best way to search for two keywords in AoPS is to input
[code]+"first keyword" +"second keyword"[/code]
so that any post containing both strings "first word" and "second form".


c) Good problem statement:
Some recent really bad post was:
[quote]$lim_{n\to 1}^{+\infty}\frac{1}{n}-lnn$[/quote]
It contains no question and no answer.
If you do this, too, you are on the best way to get your thread deleted. Write everything clearly, define where your variables come from (and define the "natural" numbers if used). Additionally read your post at least twice before submitting. After you sent it, read it again and use the Edit-Button if necessary to correct errors.


For answers to already existing threads:


d) Of any interest and with content:
Don't post things that are more trivial than completely obvious. For example, if the question is to solve $x^{3}+y^{3}=z^{3}$, do not answer with "$x=y=z=0$ is a solution" only. Either you post any kind of proof or at least something unexpected (like "$x=1337, y=481, z=42$ is the smallest solution). Someone that does not see that $x=y=z=0$ is a solution of the above without your post is completely wrong here, this is an IMO-level forum.
Similar, posting "I have solved this problem" but not posting anything else is not welcome; it even looks that you just want to show off what a genius you are.

e) Well written and checked answers:
Like c) for new threads, check your solutions at least twice for mistakes. And after sending, read it again and use the Edit-Button if necessary to correct errors.



To repeat it: ALWAYS USE YOUR COMMON SENSE IF POSTING!


Everything definitely out of range of common sense will be locked or deleted (exept for new users having less than about 42 posts, they are newbies and need/get some time to learn).

The above rules will be applied from next monday (5. march of 2007).
Feel free to discuss on this here.
49 replies
ZetaX
Feb 27, 2007
NoDealsHere
May 4, 2019
2-var inequality
sqing   1
N 42 minutes ago by sqing
Source: Own
Let $ a,b> 0 , ab(a+b+1) =3.$ Prove that$$\frac{1}{a^2}+\frac{1}{b^2}+\frac{24}{(a+b)^2} \geq 8$$$$ \frac{a}{b^2}+\frac{b}{a^2}+\frac{49}{(a+  b)^2} \geq \frac{57}{4}$$Let $ a,b> 0 ,  (a+b)(ab+1) =4.$ Prove that$$\frac{1}{a^2}+\frac{1}{b^2}+\frac{40}{(a+b)^2} \geq 12$$$$\frac{a}{b^2}+\frac{b}{a^2}+\frac{76}{(a+ b)^2}  \geq 21$$
1 reply
sqing
an hour ago
sqing
42 minutes ago
Request for the access of private marathons
Vulch   2
N 43 minutes ago by Dragon_Yang
To all AoPS users and admin,
Sometimes I came across the marathon(i .e number theory marathon, functional equation marathon etc) which allow access only after submitting log in request.There is no other way to access the question related to that marathons.It would be glad to open all private marathons publicly.Thank you!
2 replies
Vulch
2 hours ago
Dragon_Yang
43 minutes ago
Balkan Mathematical Olympiad
ABCD1728   1
N an hour ago by ABCD1728
Can anyone provide the PDF version of the book "Balkan Mathematical Olympiads" by Mircea Becheanu and Bogdan Enescu (published by XYZ press in 2014), thanks!
1 reply
ABCD1728
Yesterday at 11:27 PM
ABCD1728
an hour ago
Functional equation
shactal   0
an hour ago
Let $f:\mathbb R\to \mathbb R$ a function satifying $$f(x+2xy) = f(x) + 2f(xy)$$for all $x,y\in \mathbb R$.
If $f(1991)=a$, then what is $f(1992)$, the answer is in terms of $a$.
0 replies
shactal
an hour ago
0 replies
area of quadrilateral
AlanLG   1
N an hour ago by Altronrren
Source: 3rd National Women´s Contest of Mexican Mathematics Olympiad 2024 , level 1+2 p5
Consider the acute-angled triangle \(ABC\). The segment \(BC\) measures 40 units. Let \(H\) be the orthocenter of triangle \(ABC\) and \(O\) its circumcenter. Let \(D\) be the foot of the altitude from \(A\) and \(E\) the foot of the altitude from \(B\). Additionally, point \(D\) divides the segment \(BC\) such that \(\frac{BD}{DC} = \frac{3}{5}\). If the perpendicular bisector of segment \(AC\) passes through point \(D\), calculate the area of quadrilateral \(DHEO\).
1 reply
AlanLG
Jun 14, 2024
Altronrren
an hour ago
Inspired by 2025 SXTB
sqing   1
N an hour ago by sqing
Source: Own
Let $ a,b  $ be real number such that $ a^2+b^2=\frac12. $ Prove that
$$-\frac{\sqrt{9+6\sqrt 3}}{2}\leq(a+1)^2- (b-1)^2\leq\frac{\sqrt{9+6\sqrt 3}}{2}$$Let $ x $ be real number . Prove that
$$-\frac{2\sqrt 2}{3}\leq \frac{x}{x^2+1}+ \frac{ 2x}{x^2+4} \leq\frac{2\sqrt 2}{3}$$
1 reply
sqing
2 hours ago
sqing
an hour ago
IMO Shortlist 2014 G2
hajimbrak   14
N 2 hours ago by ezpotd
Let $ABC$ be a triangle. The points $K, L,$ and $M$ lie on the segments $BC, CA,$ and $AB,$ respectively, such that the lines $AK, BL,$ and $CM$ intersect in a common point. Prove that it is possible to choose two of the triangles $ALM, BMK,$ and $CKL$ whose inradii sum up to at least the inradius of the triangle $ABC$.

Proposed by Estonia
14 replies
hajimbrak
Jul 11, 2015
ezpotd
2 hours ago
Divisiblity...
TUAN2k8   0
2 hours ago
Source: Own
Let $m$ and $n$ be two positive integer numbers such that $m \le n$.Prove that $\binom{n}{m}$ divides $lcm(1,2,...,n)$
0 replies
TUAN2k8
2 hours ago
0 replies
interesting diophantiic fe in natural numbers
skellyrah   4
N 2 hours ago by aidan0626
Find all functions \( f : \mathbb{N} \to \mathbb{N} \) such that for all \( m, n \in \mathbb{N} \),
\[
mn + f(n!) = f(f(n))! + n \cdot \gcd(f(m), m!).
\]
4 replies
skellyrah
Yesterday at 8:01 AM
aidan0626
2 hours ago
IMO 2010 Problem 4
mavropnevma   128
N 2 hours ago by ezpotd
Let $P$ be a point interior to triangle $ABC$ (with $CA \neq CB$). The lines $AP$, $BP$ and $CP$ meet again its circumcircle $\Gamma$ at $K$, $L$, respectively $M$. The tangent line at $C$ to $\Gamma$ meets the line $AB$ at $S$. Show that from $SC = SP$ follows $MK = ML$.

Proposed by Marcin E. Kuczma, Poland
128 replies
mavropnevma
Jul 8, 2010
ezpotd
2 hours ago
Simple Geometry
AbdulWaheed   5
N 2 hours ago by Adywastaken
Source: EGMO
Try to avoid Directed angles
Let ABC be an acute triangle inscribed in circle $\Omega$. Let $X$ be the midpoint of the arc $\overarc{BC}$ not containing $A$ and define $Y, Z$ similarly. Show that the orthocenter of $XYZ$ is the incenter $I$ of $ABC$.
5 replies
AbdulWaheed
May 23, 2025
Adywastaken
2 hours ago
Who is Halp! ? (resolvedd)
A7456321   4
N 5 hours ago by A7456321
Is Halp! a bot? This user has been posting questions in nearly all of my AoPS classes when the user isn't a part of the class, and this user has 150k posts.
4 replies
A7456321
Yesterday at 9:22 PM
A7456321
5 hours ago
How to create a poll?
whwlqkd   23
N 6 hours ago by Craftybutterfly
How to create a poll in aops?
23 replies
whwlqkd
Yesterday at 12:24 PM
Craftybutterfly
6 hours ago
Stamina XP decreasing?
Craftybutterfly   18
N Today at 2:02 AM by Craftybutterfly
Summary of the problem: Last night when I checked, alcumus said I had 4250 stamina XP which is more than other people. However, when I just checked, it said I only earned 3905 XP. What is wrong?
Page URL: Hall of Fame
Steps to reproduce:
1. Go to hall of fame
2. Scroll to stamina XP earned
Expected behavior: It should still say I earned 4250 XP
Frequency: 100%
Operating system(s): HP Elitebook
Browser(s), including version: Chrome
IMAGE
18 replies
Craftybutterfly
May 22, 2025
Craftybutterfly
Today at 2:02 AM
k Laptop Problem with the AoPS Calculus class page
redelephant876   13
N Aug 29, 2023 by redelephant876
Summary of the problem: So I've been trying to do my Calculus assignments, but the page is being weird. All it does is show me the status of the first problem, and not the problem itself, or anything below that. See the attached images. I've refreshed, hard refreshed, restarted my computer, and all the typical things. However, when i pulled this up on my phone and my desktop, and it worked just fine.
Page URL: here's the link
Steps to reproduce:
1. Go to 3556 Calculus. (Note, only the mods, admins, and my classmates will be able to do this)
2. Click the Homework tab
Expected behavior: It should show all of the problems, but it doesn't.
Frequency: Every time
Operating system(s): Windows 11, HP+ Laptop
Browser(s), including version: Chrome, latest version
Additional information: This is not a problem with zooming, ratios, etc. I had changed nothing on my computer when this happened except for a few minor computer updates, which shouldn't have affected this. My Phone is an android, and the desktop is a Dell, if that helps any...
13 replies
redelephant876
Aug 28, 2023
redelephant876
Aug 29, 2023
Laptop Problem with the AoPS Calculus class page
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redelephant876
5228 posts
#1
Y by
Summary of the problem: So I've been trying to do my Calculus assignments, but the page is being weird. All it does is show me the status of the first problem, and not the problem itself, or anything below that. See the attached images. I've refreshed, hard refreshed, restarted my computer, and all the typical things. However, when i pulled this up on my phone and my desktop, and it worked just fine.
Page URL: here's the link
Steps to reproduce:
1. Go to 3556 Calculus. (Note, only the mods, admins, and my classmates will be able to do this)
2. Click the Homework tab
Expected behavior: It should show all of the problems, but it doesn't.
Frequency: Every time
Operating system(s): Windows 11, HP+ Laptop
Browser(s), including version: Chrome, latest version
Additional information: This is not a problem with zooming, ratios, etc. I had changed nothing on my computer when this happened except for a few minor computer updates, which shouldn't have affected this. My Phone is an android, and the desktop is a Dell, if that helps any...
Attachments:
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Sotowa
9245 posts
#2
Y by
Could you try using a different browser? Does this happen with every week or just Week 2?
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redelephant876
5228 posts
#3
Y by
This happens with every week. Also, I don't have any other browsers, or I would have tried that also. I was hoping the mods were able to try that, but I forgot to specify in the OP.
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Sotowa
9245 posts
#4
Y by
The issue with mods trying that is that they may not be able to reproduce the issue at all. It would be easier if you could try it yourself.
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C-123Math
252 posts
#5
Y by
I am taking the 3556 course as well and I can view all of the problems (windows and google)
This post has been edited 1 time. Last edited by C-123Math, Aug 28, 2023, 10:11 PM
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Sotowa
9245 posts
#6
Y by
Could you share OS and Browser?
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A_MatheMagician
2251 posts
#7
Y by
in my class i cannot reproduce (its a different class)
i can see all hw for all my weeks
also an hp+ win11 laptop on chrome
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balllightning37
389 posts
#8
Y by
i'm in the same class and i have the same browser and computer but i can see the problems fine, i think its a problem with your laptop
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Bookworm2008
3081 posts
#9
Y by
Do you have especially slow internet? This could be caused by the javascript problems not rendering. It has happened to me, which is why I'm asking.
This post has been edited 1 time. Last edited by Bookworm2008, Aug 28, 2023, 11:16 PM
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bpan2021
2669 posts
#10
Y by
Could there be something that's blocking the problems?
Firewall, extension, etc?
I believe you can open up the console and see what failed to load.
Z Y
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Craftybutterfly
571 posts
#11
Y by
This had happened to me once but with alcumus. What I have done is to reload the page and signing out and logging in again.
Z Y
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ethancui0529
1116 posts
#12
Y by
Hard refresh your computer maybe? I doubt that'll work, but you could also check to see if your computer can run other programs successfully, since it is most likely an internet/speed issue.
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Andrew2019
2323 posts
#13
Y by
try downloading a different browser (like this one) and then see if it loads there
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redelephant876
5228 posts
#14 • 1 Y
Y by Bookworm2008
Craftybutterfly wrote:
This had happened to me once but with alcumus. What I have done is to reload the page and signing out and logging in again.

This worked! Thank y'all!
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