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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]
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0 replies
jlacosta
May 1, 2025
0 replies
for the contest high achievers, can you share your math path?
HCM2001   12
N 29 minutes ago by HCM2001
Hi all
Just wondering if any orz or high scorers on contests at young age (which are a lot of u guys lol) can share what your math path has been like?
- school math: you probably finish calculus in 5th grade or something lol then what do you do for the rest of the school? concurrent enrollment? college class? none (focus on math competitions)?
- what grade did you get honor roll or higher on AMC 8, AMC 10, AIME qual, USAJMO qual, etc?
- besides aops do you use another program to study? (like Mr Math, Alphastar, etc)?

You're all great inspirations and i appreciate the answers.. you all give me a lot of motivation for this math journey. Thanks
12 replies
+1 w
HCM2001
5 hours ago
HCM2001
29 minutes ago
Coordbashing = 0?
UberPiggy   16
N an hour ago by UberPiggy
Hi,

I just received my USAJMO score distribution: 000 701 (very cursed I know)

The thing is, I solved #5 (Geometry) by using Cartesian coordinates and tried to show a lot of detail in my calculations. I don't think I mislabeled the pages or anything either. I don't have the scans, but does anyone know why this might be the case? Thank you!
16 replies
UberPiggy
Apr 23, 2025
UberPiggy
an hour ago
Jane street swag package? USA(J)MO
arfekete   44
N an hour ago by pieMax2713
Hey! People are starting to get their swag packages from Jane Street for qualifying for USA(J)MO, and after some initial discussion on what we got, people are getting different things. Out of curiosity, I was wondering how they decide who gets what.
Please enter the following info:

- USAMO or USAJMO
- Grade
- Score
- Award/Medal/HM
- MOP (yes or no, if yes then color)
- List of items you got in your package

I will reply with my info as an example.
44 replies
1 viewing
arfekete
May 7, 2025
pieMax2713
an hour ago
9 Did I make the right choice?
Martin2001   41
N an hour ago by GallopingUnicorn45
If you were in 8th grade, would you rather go to MOP or mc nats? I chose to study the former more and got in so was wondering if that was valid given that I'll never make mc nats.
41 replies
Martin2001
Apr 29, 2025
GallopingUnicorn45
an hour ago
the roots of ax^2+bx+c=0
zolfmark   2
N 3 hours ago by BlackOctopus23
the roots of ax^2+bx+c=0
3sinx+4cosy، 4cosx+3siny
find -b/a
2 replies
zolfmark
Oct 4, 2023
BlackOctopus23
3 hours ago
Maximum number of empty squares
Ecrin_eren   2
N 3 hours ago by OGT2020


There are 16 kangaroos on a giant 4×4 chessboard, with exactly one kangaroo on each square. In each round, every kangaroo jumps to a neighboring square (up, down, left, or right — but not diagonally). All kangaroos stay on the board. More than one kangaroo can occupy the same square. What is the maximum number of empty squares that can exist after 100 rounds?



2 replies
Ecrin_eren
Tuesday at 6:35 PM
OGT2020
3 hours ago
n is divisible by 5
spiralman   0
5 hours ago
n is an integer. There are n integers such that they are larger or equal to 1, and less or equal to 6. Sum of them is larger or equal to 4n, while sum of their square is less or equal to 22n. Prove n is divisible by 5.
0 replies
spiralman
5 hours ago
0 replies
It is given that $M=1+\frac12+\frac13+\frac14+\cdots+\frac{1}{23}=\frac{n}{23!},
Vulch   2
N 6 hours ago by P162008
It is given that $M=1+\frac12+\frac13+\frac14+\cdots+\frac{1}{23}=\frac{n}{23!},$ where $n$ is a natural number.What is the remainder when $n$ is divided by $13?$
2 replies
Vulch
Apr 9, 2025
P162008
6 hours ago
Symmetric System's Cyclic Sum
worthawholebean   6
N Yesterday at 4:09 PM by kilobyte144
If $ a+1=b+2=c+3=d+4=a+b+c+d+5$, then $ a+b+c+d$ is

$ \text{(A)}\ -5 \qquad
\text{(B)}\ -10/3 \qquad
\text{(C)}\ -7/3 \qquad
\text{(D)}\ 5/3 \qquad
\text{(E)}\ 5$
6 replies
worthawholebean
Feb 11, 2008
kilobyte144
Yesterday at 4:09 PM
Inequalities
sqing   5
N Yesterday at 2:45 PM by sqing
Let $ a,b,c>0. $ Prove that$$a^2+b^2+c^2+abc-k(a+b+c)\geq 3k+2-2(k+1)\sqrt{k+1}$$Where $7\geq k \in N^+.$
$$a^2+b^2+c^2+abc-3(a+b+c)\geq-5$$
5 replies
sqing
Tuesday at 2:23 PM
sqing
Yesterday at 2:45 PM
Find the value of k/m
zolfmark   4
N Yesterday at 2:31 PM by Shan3t
If we have
K=1/1+1/3+1/4+......1/2019

m=2018+2017/2+2016/3+......2/2017+1/2018
4 replies
zolfmark
Mar 1, 2024
Shan3t
Yesterday at 2:31 PM
geometry
luckvoltia.112   2
N Yesterday at 1:35 PM by luckvoltia.112
ChGiven an acute triangle ABC inscribed in circle $(O)$ The altitudes $BE, CF$ , intersect
each other at $H$. The tangents at $B$ and $C $of $(O)$ intersect at $S$. Let $M $be the midpoint of $BC$. $EM$ intersects $SC$
at $I$, $FM$ intersects $SB$ at $J.$
a) Prove that the points $I, S, M, J$ lie on the same circle.
b) The circle with diameter $AH$ intersects the circle $(O)$ at the second point $T.$ The line $AH$ intersects
$(O)$ at the second point $K$. Prove that $S,K,T$ are collinear.
2 replies
luckvoltia.112
May 18, 2025
luckvoltia.112
Yesterday at 1:35 PM
positive integer solutions
zolfmark   1
N Yesterday at 1:07 PM by Mathzeus1024
positive integer solutions
x^2+y^2+xy=283
1 reply
zolfmark
Jan 5, 2018
Mathzeus1024
Yesterday at 1:07 PM
Minimize z.
Entrepreneur   1
N Yesterday at 12:18 PM by Lankou
Minimize $z = 6x + 3y.$ Subject to the constraints:
$$\begin{cases}
4x+y\ge80,\\
x+5y \ge115,\\
3x+2y\le150,\\
x,y\ge0.
\end{cases}$$
1 reply
Entrepreneur
Yesterday at 11:30 AM
Lankou
Yesterday at 12:18 PM
9 ARML Location
deduck   42
N May 10, 2025 by llddmmtt1
UNR -> Nevada
St Anselm -> New Hampshire
PSU -> Pennsylvania
WCU -> North Carolina


Put your USERNAME in the list ONLY IF YOU WANT TO!!!! !!!!!

I'm going to UNR if anyone wants to meetup!!! :D

Current List:
Iowa
UNR
PSU
St Anselm
WCU
42 replies
deduck
May 6, 2025
llddmmtt1
May 10, 2025
ARML Location
G H J
G H BBookmark kLocked kLocked NReply
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deduck
238 posts
#1 • 4 Y
Y by PikaPika999, WiseTigerJ1, KevinYang2.71, heheman
9Poll:
Which ARML location are you going to?
138 Votes
19%
(26)
31%
(43)
28%
(39)
11%
(15)
11%
(15)
Hide Results Show Results
You must be signed in to vote.
UNR -> Nevada
St Anselm -> New Hampshire
PSU -> Pennsylvania
WCU -> North Carolina


Put your USERNAME in the list ONLY IF YOU WANT TO!!!! !!!!!

I'm going to UNR if anyone wants to meetup!!! :D

Current List:
Iowa
UNR
PSU
St Anselm
WCU
This post has been edited 11 times. Last edited by deduck, May 7, 2025, 4:55 PM
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DearPrince
1299 posts
#2 • 1 Y
Y by PikaPika999
which location is the one in nashua nh
bc irdk

never mind it's st anselm
This post has been edited 1 time. Last edited by DearPrince, May 6, 2025, 4:21 PM
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deduck
238 posts
#3 • 1 Y
Y by PikaPika999
wut i thought there are only 5 locations
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zhoujef000
322 posts
#4
Y by
Iowa
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MathRook7817
747 posts
#5
Y by
wheres the one for nc
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Arcticturn
206 posts
#6
Y by
Iowa
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deduck
238 posts
#7
Y by
MathRook7817 wrote:
wheres the one for nc

that's WCU
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Pengu14
635 posts
#8
Y by
psugus ⠀ ⠀
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Alex-131
5394 posts
#9 • 2 Y
Y by deduck, bjump
imo psu best location. Also does wcu like even exist
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Soupboy0
474 posts
#10
Y by
iowa best location
:D
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KevinYang2.71
428 posts
#11 • 1 Y
Y by deduck
UNR
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dragoon
1950 posts
#12 • 1 Y
Y by deduck
UNR
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bjump
1032 posts
#13
Y by
psu
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DearPrince
1299 posts
#14
Y by
St. Anselm
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ethan2011
335 posts
#15
Y by
psu
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Soupboy0
474 posts
#16
Y by
Iowa
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maxamc
584 posts
#17 • 1 Y
Y by deduck
St. Anselm
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deduck
238 posts
#18
Y by
maxamc going to arml = W
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RedFireTruck
4226 posts
#19 • 3 Y
Y by bjump, PikaPika999, Pengu14
i will be going to PSU
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Andyluo
990 posts
#20 • 1 Y
Y by PikaPika999
psu on the skibidi ohio team
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ConfidentKoala4
611 posts
#21 • 1 Y
Y by PikaPika999
psu on the best team
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torch
1016 posts
#22 • 1 Y
Y by PikaPika999
going to unr
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EaZ_Shadow
1274 posts
#23 • 1 Y
Y by PikaPika999
UNR
UNR goated!
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MathCosine
169 posts
#24 • 1 Y
Y by PikaPika999
UNR
UNR goated!
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orangebear
714 posts
#25 • 2 Y
Y by PikaPika999, Pengu14
I am going to PSU time to pull a all nighter again :D
This post has been edited 1 time. Last edited by orangebear, May 6, 2025, 11:48 PM
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wc31415
151 posts
#26
Y by
Iowa
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rhydon516
567 posts
#27
Y by
UNR
UNR goated!
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MathPerson12321
3794 posts
#28
Y by
UNR
FINALLY NEVADA PPL
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Pengu14
635 posts
#29
Y by
psu
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CrunchyCucumber
66 posts
#30
Y by
UNR
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vincentwant
1427 posts
#31
Y by
Iowa
This post has been edited 2 times. Last edited by vincentwant, May 7, 2025, 3:50 PM
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ConfidentKoala4
611 posts
#32
Y by
1/3 of the imo team is on lehigh at psu :skull:
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lpieleanu
3002 posts
#33 • 1 Y
Y by OronSH
St. Anselm
ConfidentKoala4 wrote:
1/3 of the imo team is on lehigh at psu :skull:
1/6 of the imo team is on mass arml at st. anselm!
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bachkieu
137 posts
#34
Y by
Iowa
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cyberhacker
402 posts
#35
Y by
wheres the nc gang
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deduck
238 posts
#36
Y by
cyberhacker wrote:
wheres the nc gang

theres like 1 kid going to nc lmao
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idk12345678
395 posts
#37
Y by
UNR
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imbadatmath1233
21 posts
#38
Y by
I'm going to iowa
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shawnzeng
183 posts
#39
Y by
going to nevada
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NamelyOrange
514 posts
#40
Y by
Going to North Carolina. (Not having a location close to Florida kinda sucks :()

WCU
This post has been edited 1 time. Last edited by NamelyOrange, May 10, 2025, 2:17 PM
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zhenghua
1072 posts
#41
Y by
Just signed up for an ARML team.

UNR
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AngeloChu
471 posts
#42
Y by
psu
xooks
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llddmmtt1
426 posts
#43
Y by
psu
xooks
Z K Y
N Quick Reply
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a