From old

March is the month for State MATHCOUNTS competitions! Kudos to everyone who participated in their local chapter competitions and best of luck to all going to State! Join us on March 11th for a Math Jam devoted to our favorite Chapter competition problems! Are you interested in training for MATHCOUNTS? Be sure to check out our AMC 8/MATHCOUNTS Basics and Advanced courses.

Are you ready to level up with Olympiad training? Registration is open with early bird pricing available for our WOOT programs: MathWOOT (Levels 1 and 2), CodeWOOT, PhysicsWOOT, and ChemWOOT. What is WOOT? WOOT stands for Worldwide Online Olympiad Training and is a 7-month high school math Olympiad preparation and testing program that brings together many of the best students from around the world to learn Olympiad problem solving skills. Classes begin in September!

Do you have plans this summer? There are so many options to fit your schedule and goals whether attending a summer camp or taking online classes, it can be a great break from the routine of the school year. Check out our summer courses at AoPS Online, or if you want a math or language arts class that doesn’t have homework, but is an enriching summer experience, our AoPS Virtual Campus summer camps may be just the ticket! We are expanding our locations for our AoPS Academies across the country with 15 locations so far and new campuses opening in Saratoga CA, Johns Creek GA, and the Upper West Side NY. Check out this page for summer camp information.

Be sure to mark your calendars for the following events:
[list][*]March 5th (Wednesday), 4:30pm PT/7:30pm ET, HCSSiM Math Jam 2025. Amber Verser, Assistant Director of the Hampshire College Summer Studies in Mathematics, will host an information session about HCSSiM, a summer program for high school students.
[*]March 6th (Thursday), 4:00pm PT/7:00pm ET, Free Webinar on Math Competitions from elementary through high school. Join us for an enlightening session that demystifies the world of math competitions and helps you make informed decisions about your contest journey.
[*]March 11th (Tuesday), 4:30pm PT/7:30pm ET, 2025 MATHCOUNTS Chapter Discussion MATH JAM. AoPS instructors will discuss some of their favorite problems from the MATHCOUNTS Chapter Competition. All are welcome!
[*]March 13th (Thursday), 4:00pm PT/7:00pm ET, Free Webinar about Summer Camps at the Virtual Campus. Transform your summer into an unforgettable learning adventure! From elementary through high school, we offer dynamic summer camps featuring topics in mathematics, language arts, and competition preparation - all designed to fit your schedule and ignite your passion for learning.[/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.

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0 replies

jlacosta

Mar 2, 2025

0 replies

k i Suggestion Form

jwelsh 0

May 6, 2021

Hello!

Given the number of suggestions we’ve been receiving, we’re transitioning to a suggestion form. If you have a suggestion for the AoPS website, please submit the Google Form:
Suggestion Form

To keep all new suggestions together, any new suggestion threads posted will be deleted.

Please remember that if you find a bug outside of FTW! (after refreshing to make sure it’s not a glitch), make sure you’re following the How to write a bug report instructions and using the proper format

Summary of the problem:
Page URL:
Steps to reproduce:
1.
2.
3.
...
Expected behavior:
Frequency:
Operating system(s):
Browser(s), including version:
Additional information:

If your computer or tablet is school issued, please indicate this under Additional information.

to report the bug.

Please check the FTW! thread for bugs and post any new ones in the For the Win! and Other Games Support Forum.

0 replies

jwelsh

May 6, 2021

0 replies

k i Read me first / How to write a bug report

slester 3

N May 4, 2019 by LauraZed

Greetings, AoPS users!

If you're reading this post, that means you've come across some kind of bug, error, or misbehavior, which nobody likes! To help us developers solve the problem as quickly as possible, we need enough information to understand what happened. Following these guidelines will help us squash those bugs more effectively.

Before submitting a bug report, please confirm the issue exists in other browsers or other computers if you have access to them.

For a list of many common questions and issues, please see our user created FAQ, Community FAQ, or For the Win! FAQ.

What is a bug?
A bug is a misbehavior that is reproducible. If a refresh makes it go away 100% of the time, then it isn't a bug, but rather a glitch. That's when your browser has some strange file cached, or for some reason doesn't render the page like it should. Please don't report glitches, since we generally cannot fix them. A glitch that happens more than a few times, though, could be an intermittent bug.

If something is wrong in the wiki, you can change it! The AoPS Wiki is user-editable, and it may be defaced from time to time. You can revert these changes yourself, but if you notice a particular user defacing the wiki, please let an admin know.

The subject
The subject line should explain as clearly as possible what went wrong.

Bad: Forum doesn't work
Good: Switching between threads quickly shows blank page.

The report
Use this format to report bugs. Be as specific as possible. If you don't know the answer exactly, give us as much information as you know. Attaching a screenshot is helpful if you can take one.

Summary of the problem:
Page URL:
Steps to reproduce:
1.
2.
3.
...
Expected behavior:
Frequency:
Operating system(s):
Browser(s), including version:
Additional information:

If your computer or tablet is school issued, please indicate this under Additional information.

Example
Summary of the problem: When I click back and forth between two threads in the site support section, the content of the threads no longer show up. (See attached screenshot.)
Page URL: http://artofproblemsolving.com/community/c10_site_support
Steps to reproduce:
1. Go to the Site Support forum.
2. Click on any thread.
3. Click quickly on a different thread.
Expected behavior: To see the second thread.
Frequency: Every time
Operating system: Mac OS X
Browser: Chrome and Firefox
Additional information: Only happens in the Site Support forum. My tablet is school issued, but I have the problem at both school and home.

How to take a screenshot
Mac OS X: If you type ⌘+Shift+4, you'll get a "crosshairs" that lets you take a custom screenshot size. Just click and drag to select the area you want to take a picture of. If you type ⌘+Shift+4+space, you can take a screenshot of a specific window. All screenshots will show up on your desktop.

Windows: Hit the Windows logo key+PrtScn, and a screenshot of your entire screen. Alternatively, you can hit Alt+PrtScn to take a screenshot of the currently selected window. All screenshots are saved to the Pictures → Screenshots folder.

Advanced
If you're a bit more comfortable with how browsers work, you can also show us what happens in the JavaScript console.

In Chrome, type CTRL+Shift+J (Windows, Linux) or ⌘+Option+J (Mac).
In Firefox, type CTRL+Shift+K (Windows, Linux) or ⌘+Option+K (Mac).
In Internet Explorer, it's the F12 key.
In Safari, first enable the Develop menu: Preferences → Advanced, click "Show Develop menu in menu bar." Then either go to Develop → Show Error console or type Option+⌘+C.

It'll look something like this:
IMAGE

3 replies

slester

Apr 9, 2015

LauraZed

May 4, 2019

k i Community Safety

dcouchman 0

Jan 18, 2018

If you find content on the AoPS Community that makes you concerned for a user's health or safety, please alert AoPS Administrators using the report button (Z) or by emailing sheriff@aops.com . You should provide a description of the content and a link in your message. If it's an emergency, call 911 or whatever the local emergency services are in your country.

Please also use those steps to alert us if bullying behavior is being directed at you or another user. Content that is "unlawful, harmful, threatening, abusive, harassing, tortuous, defamatory, vulgar, obscene, libelous, invasive of another's privacy, hateful, or racially, ethnically or otherwise objectionable" (AoPS Terms of Service 5.d) or that otherwise bullies people is not tolerated on AoPS, and accounts that post such content may be terminated or suspended.

0 replies

dcouchman

Jan 18, 2018

0 replies

Simple vector geometry existence

AndreiVila 3

N 34 minutes ago by Ianis

Source: Romanian District Olympiad 2025 9.1

Let $ABCD$ be a parallelogram of center $O$ . Prove that for any point $M\in (AB)$ , there exist unique points $N\in (OC)$ and $P\in (OD)$ such that $O$ is the center of mass of $\triangle MNP$ .

3 replies

1 viewing

AndreiVila

Mar 8, 2025

Ianis

34 minutes ago

Checkerboard

Ecrin_eren 1

N an hour ago by Ecrin_eren

On an 8×8 checkerboard, what is the minimum number of squares that must be marked (including the marked ones) so that every square has exactly one marked neighbor? (We define neighbors as squares that share a common edge, and a square is not considered a neighbor of itself.)

1 reply

Ecrin_eren

Today at 5:20 AM

Ecrin_eren

an hour ago

BD tangent to (MDE) , rhombus ABCD with <DCB=60^o

parmenides51 1

N an hour ago by vanstraelen

Source: 2021 Germany R4 10.6 https://artofproblemsolving.com/community/c3208025_

Let a rhombus $ABCD$ with $|\angle DCB| = 60^o$ be given . On the extension of the segment $\overline{CD}$ beyond $D$ , a point $E$ is chosen arbitrarily. Let the line through $E$ and $A$ intersect the line $BC$ at the point $F$ . Let $M$ be the intersection of the lines $BE$ and $DF$ . Prove that the line $BD$ is tangent to the circumcircle of the triangle $MDE$ .

1 reply

parmenides51

Oct 6, 2024

vanstraelen

an hour ago

Geometry Problem #42

vankhea 2

N 2 hours ago by kaede_Arcadia

Source: Van Khea

Let $P$ be any point. Let $D, E, F$ be projection point from $P$ to $BC, CA, AB$ . Circumcircle $(ABC)$ cuts circumcircle $(AEF), (BFD), (CDE)$ at $A_1, B_1, C_1$ . Let $A_2, B_2, C_2$ be antipode of $A_1, B_1, C_1$ wrt $(AEF), (BFD), (CDE)$ . Prove that $A_2, B_2, C_2, P$ are cyclic.

2 replies

vankhea

Sep 6, 2023

kaede_Arcadia

2 hours ago

k AoPS Academy: Exporting rich format results in broken BBCode.

Minium 1

N Wednesday at 9:06 PM by jlacosta

When exporting a rich format document in the writing tab into the message board, bold formatting specifically is broken and results in broken BBCode.
Page URL: virtual.aopsacademy.org/class/<any writing class works here>/writing

TO REPRODUCE
1. enter "Lorem ipsum".
2. apply bold to "Lorem"
3. apply italic to "ip".
4. click the Post Draft on Message Board
5. read the contents of the message board post.

FOR EXAMPLE
When I format "Lorem ipsum" (in the writing tab of course), but when I export to post it, I get

[code]Lorem[/b] ipsum[/code].

Notice that the first bolding does not start, only ends.

1 reply

Minium

Mar 18, 2025

jlacosta

Wednesday at 9:06 PM

k How to report tags

Craftybutterfly 6

N Mar 19, 2025 by Demetri

Not sure if this belongs in site support but how do you report tags for topics? I recently noticed in one of the topics I made on site support had really weird tags.

6 replies

Craftybutterfly

Mar 19, 2025

Demetri

Mar 19, 2025

delete tag

o.k.oo 5

N Mar 19, 2025 by Zestra

The tag section for the question I shared is deleted after a while. What should not be done? Thanks.

5 replies

o.k.oo

Mar 18, 2025

Zestra

Mar 19, 2025

Rating Up Not Occuring

CatsRule222 2

N Mar 19, 2025 by aidan0626

Bug: In the state round, I answered 10 questions correctly without the rating changing at all (rating 43 currently) in the other rounds, it always works.
URL: https://artofproblemsolving.com/mathcounts_trainer/play
How to Recreate:
1. Get to mathcounts trainer rating 43 on state round, and it will glitch.

2 replies

CatsRule222

Mar 19, 2025

aidan0626

Mar 19, 2025

k Pressing 'go down button' always creates a gray box on the last post

Craftybutterfly 18

N Mar 18, 2025 by jlacosta

Summary of the problem: Pressing go down to last post button always creates a gray box overlapping last post
Page URL: any forum
Steps to reproduce:
1. Go to any topic in a forum
2. The gray box at the bottom overlaps part of the first post
Expected behavior: Should not show a gray box
Frequency: 100% of the time
Operating system(s): Linux HP EliteBook 835 G8 Notebook PC
Browser(s), including version: Chrome 133.0.6943.142 (Official Build) (64-bit) (cohort: Stable)
Additional information: It works on any other device, on my iPhone XR, a MacOS, and my iPad. Took the screenshot a month ago. The gray box still appears

18 replies

Craftybutterfly

Mar 12, 2025

jlacosta

Mar 18, 2025

k The My classes tab shows cyan even though im on community

Craftybutterfly 10

N Mar 18, 2025 by jlacosta

Summary of the problem: The My classes tab shows cyan even though I'm on community. Notice the tabs next to the AoPS Online words.
Page URL: artofproblemsolving.com/community
Steps to reproduce:
1. Press on my classes next to the AoPS Online
2. Then press on community tab
Expected behavior: My Classes tab should be dark blue
Frequency: 100%
Operating system(s): HP EliteBook 835 G8 Notebook PC
Browser(s), including version: Chrome: 134.0.6998.89 (Official Build) (64-bit) (cohort: Stable)
Additional information: It happens on this specific computer only.

10 replies

Craftybutterfly

Mar 17, 2025

jlacosta

Mar 18, 2025

k Happy St. Patrick's Day!

A_Crabby_Crab 62

N Mar 18, 2025 by Moonshot

A very happy St. Patrick's day to all!

62 replies

A_Crabby_Crab

Mar 17, 2025

Moonshot

Mar 18, 2025

Mathcounts Trainer Leaderboard

ChristianYoo 3

N Mar 18, 2025 by Craftybutterfly

The leaderboard is broken.

3 replies

ChristianYoo

Mar 18, 2025

Craftybutterfly

Mar 18, 2025

Minor Color Issue

KangarooPrecise 3

N Mar 18, 2025 by BrighterFrog11

In my AOPS class, there are points on your report where your red bar turns orange, and your orange turns green, well my orange bar passed the small green mark but the bar did not turn green. I can't take a screenshot, but my orange bar should be green according to the color marking.

3 replies

KangarooPrecise

Mar 18, 2025

BrighterFrog11

Mar 18, 2025

k Negative accuracy?

DarintheBoy 3

N Mar 17, 2025 by DarintheBoy

Slow and Steady (Accuracy) I
Gain 100 Accuracy XP per day in each of the next 2 days. (-19 XP on day 1)

How did this happen? Has anyone else had this?

3 replies

DarintheBoy

Mar 17, 2025

DarintheBoy

Mar 17, 2025

From old

Nguyenhuyen_AG 108

N Feb 18, 2021 by Nguyenhuyen_AG

Source: Create a new inequality from old idea

Let $a,\,b,\,c$ are positive real numbers, prove that
$\frac{a^2}{b^2}+\frac{b^2}{c^2}+\frac{c^2}{a^2} \geqslant \frac{a}{b}+\frac{b}{c}+\frac{c}{a}+\frac{k(a-b)(b-c)(c-a)}{abc},$ where $k = 5 + 6\sqrt{3} \cos \frac{\pi}{18} \approx 15.234$