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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
5 hours ago
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.

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0 replies
jlacosta
5 hours ago
0 replies
Introducing myself at AoPS, and what's your magic wand?
asuth_asuth   1044
N 2 hours ago by Craftybutterfly
Hi!

I'm Andrew Sutherland. I'm the new Chief Product Officer at AoPS. As you may have read, Richard is retiring and Ben Kornell and I are working together to lead the company now. I'm leading all the software and digital stuff at AoPS. I just wanted to say hello and introduce myself! I'm really excited to be part of the special community that is AoPS.

Previously, I founded Quizlet as a 15-year-old high school student. I did Course 6 at MIT and then left to lead Quizlet full-time for a total of 14 years. I took a few years off and now I'm doing AoPS! I wrote more about all that on my blog: https://asuth.com/im-joining-aops

I have a question for all of you. If you could wave a magic wand, and change anything about AoPS, what would it be? All suggestions welcome! Thank you.
1044 replies
asuth_asuth
Mar 30, 2025
Craftybutterfly
2 hours ago
There is an Office Hours bar?
NumberNinja11   1
N 3 hours ago by bpan2021
Hi! I've noticed a lot of posts about Office Hours banners, but I've never had an Office Hours banner after my 5 or so classes of AoPS. Is there a setting I'm missing? I didn't even know that there should be a banner until recently. Has Office Hours stopped happening or something? -NumberNinja11
1 reply
NumberNinja11
4 hours ago
bpan2021
3 hours ago
Geometry
BBNoDollar   0
5 hours ago
Let ABCD be a convex quadrilateral with angles BAD and BCD obtuse, and let the points E, F ∈ BD, such that AE ⊥ BD and CF ⊥ BD.
Prove that 1/(AE*CF) ≥ 1/(AB*BC) + 1/(AD*CD) .
0 replies
BBNoDollar
5 hours ago
0 replies
Coprime sequence
Ecrin_eren   1
N 6 hours ago by revol_ufiaw


"Let N be a natural number. Show that any two numbers from the following sequence are coprime:

2^1 + 1, 2^2 + 1, 2^3 + 1, ..., 2^N + 1."



1 reply
Ecrin_eren
Yesterday at 8:53 PM
revol_ufiaw
6 hours ago
Cannot post PHP
char0221   4
N 6 hours ago by Elephant200
Summary of the problem: If I try to post anything with PHP (a coding language), it
Page URL: In any forum or private messages
Steps to reproduce:
1. Create a post.
2. Put some PHP inside, can't give example
Expected behavior: Should post the message
Frequency: 100%
Operating system(s): macOS Sequoia 15.2.1
Browser(s), including version: Safari
Additional information: See attachments
4 replies
char0221
Apr 30, 2025
Elephant200
6 hours ago
Find the functions
Ecrin_eren   1
N Yesterday at 10:02 PM by undefined-NaN


"Find all differentiable functions f that satisfy the condition f(x) + f(y) = f((x + y) / (1 - xy)) for all x, y ∈ R, where x ≠ 1 and y ≠ 1."





1 reply
Ecrin_eren
Yesterday at 8:58 PM
undefined-NaN
Yesterday at 10:02 PM
If it is an integer then perfect square
Ecrin_eren   0
Yesterday at 8:55 PM


"Let a, b, c, d be non-zero digits, and let abcd and dcba represent four-digit numbers.

Show that if the number abcd / dcba is an integer, then that integer is a perfect square."



0 replies
Ecrin_eren
Yesterday at 8:55 PM
0 replies
Sum of arctan
Ecrin_eren   1
N Yesterday at 8:53 PM by Shan3t


Find the value of the sum:
sum from n = 0 to infinity of arctan(k / (n² + kn + 1))


1 reply
Ecrin_eren
Yesterday at 8:49 PM
Shan3t
Yesterday at 8:53 PM
Rely box disappearing
Craftybutterfly   11
N Yesterday at 8:36 PM by Craftybutterfly
For some reason, on my iPhone XR, when I press on the view my posts button, then press on an unlocked topic and scroll down or press go down button, the reply box disappears. I can’t use the proper format right now as I am on phone.
11 replies
Craftybutterfly
Wednesday at 3:12 PM
Craftybutterfly
Yesterday at 8:36 PM
Cool vieta sum
Kempu33334   6
N Yesterday at 6:29 PM by Lankou
Let the roots of \[\mathcal{P}(x) = x^{108}+x^{102}+x^{96}+2x^{54}+3x^{36}+4x^{24}+5x^{18}+6\]be $r_1, r_2, \dots, r_{108}$. Find \[\dfrac{r_1^6+r_2^6+\dots+r_{108}^6}{r_1^6r_2^6+r_1^6r_3^6+\dots+r_{107}^6r_{108}^6}\]without Newton Sums.
6 replies
Kempu33334
Wednesday at 11:44 PM
Lankou
Yesterday at 6:29 PM
đề hsg toán
akquysimpgenyabikho   3
N Yesterday at 5:50 PM by Lankou
làm ơn giúp tôi giải đề hsg

3 replies
akquysimpgenyabikho
Apr 27, 2025
Lankou
Yesterday at 5:50 PM
A problem with a rectangle
Raul_S_Baz   13
N Yesterday at 4:38 PM by undefined-NaN
On the sides AB and AD of the rectangle ABCD, points M and N are taken such that MB = ND. Let P be the intersection of BN and CD, and Q be the intersection of DM and CB. How can we prove that PQ || MN?
IMAGE
13 replies
Raul_S_Baz
Apr 26, 2025
undefined-NaN
Yesterday at 4:38 PM
Find the domain and range of $f(x)=2-|x-5|.$
Vulch   1
N Yesterday at 12:13 PM by Mathzeus1024
Find the domain and range of $f(x)=2-|x-5|.$
1 reply
Vulch
Yesterday at 2:07 AM
Mathzeus1024
Yesterday at 12:13 PM
nice problem
teomihai   1
N Yesterday at 11:58 AM by Royal_mhyasd
Let set $A =\{0,1,2,3,...,n\}$ , where $n$ it is positiv ,integer number.
How many subsets of A contain at least one odd number?
1 reply
teomihai
Yesterday at 11:46 AM
Royal_mhyasd
Yesterday at 11:58 AM
k Python turtle
Speedysolver1   15
N Apr 16, 2025 by jlacosta
It gave a turtle window as seen without import turtle
print("this does not import turtle")

IMAGE
15 replies
Speedysolver1
Apr 10, 2025
jlacosta
Apr 16, 2025
Python turtle
G H J
G H BBookmark kLocked kLocked NReply
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Speedysolver1
133 posts
#1
Y by
It gave a turtle window as seen without import turtle
  1. print("this does not import turtle")

https://cdn.artofproblemsolving.com/attachments/5/d/89ec62e714378f19a06d77f2a6931d1d342dcd.png
This post has been edited 3 times. Last edited by Speedysolver1, Apr 10, 2025, 8:28 PM
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Speedysolver1
133 posts
#2
Y by
Also it doesn’t print
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Irreplaceable
1271 posts
#4
Y by
Speedysolver1 wrote:
It gave a turtle window as seen without import turtle
  1. print("this does not import turtle")
Z Y
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Irreplaceable
1271 posts
#5
Y by
I fixed it you should check your keyboard if it is on INT or US
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Demetri
1337 posts
#6 • 1 Y
Y by Irreplaceable
It doesn't print because you are using tildas(`) around the string (why are you using tildas) and it imports turtle because that is how aops code is desgined. @2above fixes it for you
This post has been edited 3 times. Last edited by Demetri, Apr 10, 2025, 8:11 PM
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Speedysolver1
133 posts
#7
Y by
I edited can reproduce
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Craftybutterfly
411 posts
#8
Y by
Try doing print('your words'). notice that I used ' instead of ". Or maybe there is something wrong with AoPS python window
This post has been edited 1 time. Last edited by Craftybutterfly, Apr 10, 2025, 8:26 PM
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Irreplaceable
1271 posts
#9
Y by
Craftybutterfly wrote:
Try doing print('your words'). notice that I used ' instead of "

no no you can use single quotes for a print statement
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Demetri
1337 posts
#10
Y by
I edited can reproduce
The issue is resolved? It prints now, and importing turtle is intended, in fact its in the code:
if (prog.indexOf("import turtle") > -1) {
            $('#' + Sk.TurtleGraphics.target).show();
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Speedysolver1
133 posts
#11
Y by
Demetri wrote:
I edited can reproduce
The issue is resolved? It prints now, and importing turtle is intended, in fact its in the code:
if (prog.indexOf("import turtle") > -1) {
            $('#' + Sk.TurtleGraphics.target).show();

not resolved it still happens
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Speedysolver1
133 posts
#12
Y by
see the attachments
Attachments:
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Demetri
1337 posts
#13
Y by
Demetri wrote:
I edited can reproduce
The issue is resolved? It prints now, and importing turtle is intended, in fact its in the code:
if (prog.indexOf("import turtle") > -1) {
            $('#' + Sk.TurtleGraphics.target).show();

not resolved it still happens
It is resolved, it happens on purpose.
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Speedysolver1
133 posts
#14
Y by
Why does it
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Demetri
1337 posts
#15 • 2 Y
Y by Speedysolver1, InsightfulHawk16
Why does it
Aops searches for "import turtle" in the python code and if it detects that it will import it. @below you can put [RESOLVED] in the title because \req lock doesn't do much
This post has been edited 1 time. Last edited by Demetri, Apr 10, 2025, 8:43 PM
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bpan2021
2628 posts
#18 • 1 Y
Y by Speedysolver1
Why does it
Aops searches for "import turtle" in the python code and if it detects that it will import it. @below you can put [RESOLVED] in the title because \req lock doesn't do much

But that is not how Python is supposed to function. It's only supposed to register instances where "import turtle" is not some string, another data type, or is part of some piece of code that doesn't want to import turtle, but rather an actual import statement. If "import turtle" was not in the code as an import statement, then the turtle box should not appear.

The way that this functions is wrong and isn't accepted in Python, so it should be a bug.
This post has been edited 1 time. Last edited by bpan2021, Apr 11, 2025, 12:41 AM
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jlacosta
640 posts
#24 • 1 Y
Y by aidan0626
Thanks for reporting this! We'll pass it along.
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