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k a My Retirement & New Leadership at AoPS
rrusczyk   1571
N Mar 26, 2025 by SmartGroot
I write today to announce my retirement as CEO from Art of Problem Solving. When I founded AoPS 22 years ago, I never imagined that we would reach so many students and families, or that we would find so many channels through which we discover, inspire, and train the great problem solvers of the next generation. I am very proud of all we have accomplished and I’m thankful for the many supporters who provided inspiration and encouragement along the way. I'm particularly grateful to all of the wonderful members of the AoPS Community!

I’m delighted to introduce our new leaders - Ben Kornell and Andrew Sutherland. Ben has extensive experience in education and edtech prior to joining AoPS as my successor as CEO, including starting like I did as a classroom teacher. He has a deep understanding of the value of our work because he’s an AoPS parent! Meanwhile, Andrew and I have common roots as founders of education companies; he launched Quizlet at age 15! His journey from founder to MIT to technology and product leader as our Chief Product Officer traces a pathway many of our students will follow in the years to come.

Thank you again for your support for Art of Problem Solving and we look forward to working with millions more wonderful problem solvers in the years to come.

And special thanks to all of the amazing AoPS team members who have helped build AoPS. We’ve come a long way from here:IMAGE
1571 replies
rrusczyk
Mar 24, 2025
SmartGroot
Mar 26, 2025
k a March Highlights and 2025 AoPS Online Class Information
jlacosta   0
Mar 2, 2025
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
Math Problem(s)
greenhuman23   2
N an hour ago by corgi61
Fill in the blanks to make the equation true.
( __−__ ) ⋅ __ ÷ __ + __ = 59/7

With the digit(s) below make the equation true-

$1$, $3$, $5$, $7$, $9$.
2 replies
greenhuman23
3 hours ago
corgi61
an hour ago
Math Competitions
anishka14   5
N 2 hours ago by iwillregretthisnamelater
Hi everyone!

So I am currently in grade 6, and if anyone could give any tips for getting high scores in math competition, that would be great!

I haven't been doing so well in AMC 8, and other competitions like Math Kangaroo, etc....

I feel like i'm stuck, so if anyone could give any resources that helped you learn and score better, could you share that with me?

Thank you so much!

( also how much time should i spend on math every day? )
5 replies
anishka14
Yesterday at 7:55 PM
iwillregretthisnamelater
2 hours ago
Powers of 10
PatTheKing806   4
N 2 hours ago by PatTheKing806
What is (9 x 10^10) - (4 x 10^10)
4 replies
PatTheKing806
Jun 29, 2022
PatTheKing806
2 hours ago
Something Horrible-a Challenge
Xueshuxue   19
N 3 hours ago by pieMax2713
Hello, I was wondering if it's possible to make 8 with the numbers 5, 3, 5, and 7 under the following rules:
-You can only use 5 twice, 3 once, and 7 once.
-You must use all the numbers.
You can stack numbers to form larger numbers (example: I could take 3 and 5 and turn it into 35 or 53, or use 7, 3, and 5 to make 375.)
-You are allowed to use parentheses.
(Also, I already found out that no 3 digital numbers will work for the solution.)
19 replies
Xueshuxue
Friday at 7:09 PM
pieMax2713
3 hours ago
No more topics!
The sheep problem
ysn613   45
N Mar 28, 2025 by happyfish0922
a) If I have three sheep, how can I arrange them so that they are all an equal distance away from each other?
b)If I have four sheep, how can I do the same thing as I wanted to do in part a)?
45 replies
ysn613
Mar 26, 2025
happyfish0922
Mar 28, 2025
The sheep problem
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ChaitraliKA
995 posts
#36
Y by
Guys please don't let this thread get locked
I can't risk losing any more posts, this is important to me!!!!! :pray:
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nmlikesmath
461 posts
#38
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"the crops have been destroyed" ahh moment
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jkim0656
395 posts
#41
Y by
vmene wrote:
aidan0626 wrote:
"assume that sheep are unmoving points" ahh moment

No this is a "assume cows are spherical" ahh moment

i had a math class and they assumed an elephant was a sphere a person was a cylinder and a car was a cube :rotfl:
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happyfish0922
232 posts
#43
Y by
I think this can be done with non-Euclidean geometry easily for the 4-sheeps case, but as far as I know, the 5 sheeps case would require something like a continuous 4D manifold onto 3D (of the specific shape needed).
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Aaronjudgeisgoat
856 posts
#44
Y by
happyfish0922 wrote:
I think this can be done with non-Euclidean geometry easily for the 4-sheeps case, but as far as I know, the 5 sheeps case would require something like a continuous 4D manifold onto 3D (of the specific shape needed).

for the 4 sheep case, i believe that a regular tetrahedron works, which i think falls under the euclidean geometry category?
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happyfish0922
232 posts
#45
Y by
Aaronjudgeisgoat wrote:
happyfish0922 wrote:
I think this can be done with non-Euclidean geometry easily for the 4-sheeps case, but as far as I know, the 5 sheeps case would require something like a continuous 4D manifold onto 3D (of the specific shape needed).

for the 4 sheep case, i believe that a regular tetrahedron works, which i think falls under the euclidean geometry category?

That is true, but I was referring to spherical geometry, which I believe allows a tetrahedron, anywho, that isn't a 2D Euclidean, though it is a 3D.

BTW I don't think Euclid ever did much related to 3D.
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Inaaya
202 posts
#46
Y by
ChaitraliKA wrote:
Guys use vsepr theory :thumbup:

london dispersion forces ahh
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happyfish0922
232 posts
#47
Y by
Inaaya wrote:
ChaitraliKA wrote:
Guys use vsepr theory :thumbup:

london dispersion forces ahh

I don't want to go too off topic, but I'm pretty sure that in practice, VSEPR theory only applies to local particles, sooooo yeah. Your 4 sheep iteration will fall apart in about 5 milliseconds.
This post has been edited 1 time. Last edited by happyfish0922, Mar 28, 2025, 1:24 AM
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Aaronjudgeisgoat
856 posts
#48
Y by
Inaaya wrote:
ChaitraliKA wrote:
Guys use vsepr theory :thumbup:

london dispersion forces ahh

erm actually vsepr theory is valence shell electron pair repulsion theory, which refers to molecular geometry while london dispersion forces refers to intermolecular forces so they arent the same :nerd:

Click to reveal hidden text
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Inaaya
202 posts
#53
Y by
Aaronjudgeisgoat wrote:
Inaaya wrote:
ChaitraliKA wrote:
Guys use vsepr theory :thumbup:

london dispersion forces ahh

erm actually vsepr theory is valence shell electron pair repulsion theory, which refers to molecular geometry while london dispersion forces refers to intermolecular forces so they arent the same :nerd:

Click to reveal hidden text

um actually the four vsepr structures are linear, trianglular, tetrahedral, octahedral, or *googles frantically* a ...trigonal bypyramid
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happyfish0922
232 posts
#54
Y by
Inaaya wrote:
Aaronjudgeisgoat wrote:
Inaaya wrote:

london dispersion forces ahh

erm actually vsepr theory is valence shell electron pair repulsion theory, which refers to molecular geometry while london dispersion forces refers to intermolecular forces so they arent the same :nerd:

Click to reveal hidden text

um actually the four vsepr structures are linear, trianglular, tetrahedral, octahedral, or *googles frantically* a ...trigonal bypyramid

Can we please get over VESPR theory since by now we all know that the structure, though potentially possibly being formed, will collapse pretty much spontaneously.
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Aaronjudgeisgoat
856 posts
#55
Y by
Inaaya wrote:
um actually the four vsepr structures are linear, trianglular, tetrahedral, octahedral, or *googles frantically* a ...trigonal bypyramid

um actually there is also seesaw, t-shaped, and *thinks frantically* a... trigonal pyramidal
and also trigonal planar and other things too
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rhydon516
541 posts
#56
Y by
jkim0656 wrote:
they will all die from the phenomenon of magically being squished together in the exact same spot

this is only true for $n>24$. the laws of entity cramming dictates otherwise for $n\le24$, unless you have access to a server backdoor.

@2below it’s a joke; besides, i really don’t think this discussion was very serious anyway
This post has been edited 2 times. Last edited by rhydon516, Friday at 5:53 PM
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happyfish0922
232 posts
#57
Y by
VESPR theory aside, can we all agree that we just take a manifold of 4D and shove a 4d tetra into the manifold, JUST FOR THE FUNSIES?

:thumbup:
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happyfish0922
232 posts
#58
Y by
rhydon516 wrote:
jkim0656 wrote:
they will all die from the phenomenon of magically being squished together in the exact same spot

this is only true for $n>24$. the laws of entity cramming dictates otherwise for $n\le24$, unless you have access to a server backdoor.

Okay sorry for the double post, but I just say this, and OKAY buddy, not to be mean or anything but sorry, this is a real-world situation, please please please do not think this is Minecraft. I get it, Minecraft's fun, I play it myself, but this is HSO... oh shoot its MSM common sense isn't at the top, anyways be logical, just please don't go off topic like that.
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