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Contests & Programs AMC and other contests, summer programs, etc.
AMC and other contests, summer programs, etc.
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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.

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0 replies
jlacosta
May 1, 2025
0 replies
[CASH PRIZES] IndyINTEGIRLS Spring Math Competition
Indy_Integirls   30
N a few seconds ago by GallopingUnicorn45
[center]IMAGE

Greetings, AoPS! IndyINTEGIRLS will be hosting a virtual math competition on May 25,
2024 from 12 PM to 3 PM EST.
Join other woman-identifying and/or non-binary "STEMinists" in solving problems, socializing, playing games, winning prizes, and more! If you are interested in competing, please register here![/center]

----------

[center]Important Information[/center]

Eligibility: This competition is open to all woman-identifying and non-binary students in middle and high school. Non-Indiana residents and international students are welcome as well!

Format: There will be a middle school and high school division. In each separate division, there will be an individual round and a team round, where students are grouped into teams of 3-4 and collaboratively solve a set of difficult problems. There will also be a buzzer/countdown/Kahoot-style round, where students from both divisions are grouped together to compete in a MATHCOUNTS-style countdown round! There will be prizes for the top competitors in each division.

Problem Difficulty: Our amazing team of problem writers is working hard to ensure that there will be problems for problem-solvers of all levels! The middle school problems will range from MATHCOUNTS school round to AMC 10 level, while the high school problems will be for more advanced problem-solvers. The team round problems will cover various difficulty levels and are meant to be more difficult, while the countdown/buzzer/Kahoot round questions will be similar to MATHCOUNTS state to MATHCOUNTS Nationals countdown round in difficulty.

Platform: This contest will be held virtually through Zoom. All competitors are required to have their cameras turned on at all times unless they have a reason for otherwise. Proctors and volunteers will be monitoring students at all times to prevent cheating and to create a fair environment for all students.

Prizes: At this moment, prizes are TBD, and more information will be provided and attached to this post as the competition date approaches. Rest assured, IndyINTEGIRLS has historically given out very generous cash prizes, and we intend on maintaining this generosity into our Spring Competition.

Contact & Connect With Us: Email us at indy@integirls.org.

---------
[center]Help Us Out

Please help us in sharing the news of this competition! Our amazing team of officers has worked very hard to provide this educational opportunity to as many students as possible, and we would appreciate it if you could help us spread the word!
30 replies
Indy_Integirls
May 11, 2025
GallopingUnicorn45
a few seconds ago
9 USAMO/JMO
BAM10   18
N 5 minutes ago by TiguhBabeHwo
I mock ~90-100 on very recent AMC 10 mock right now. I plan to take AMC 10 final fives(9th), intermediate NT(9th), aime A+B courses in 10th and 11th and maybe mathWOOT 1 (12th). For more info I got 20 on this years AMC 8 with 3 sillies and 32 on MATHCOUNTS chapter. Also what is a realistic timeline to do this
18 replies
BAM10
May 19, 2025
TiguhBabeHwo
5 minutes ago
mathpath: how much do recommendations matter
mm999aops   25
N 12 minutes ago by ethan2011
See question^

I'm hoping only the QT matters : P
25 replies
mm999aops
Feb 3, 2023
ethan2011
12 minutes ago
4th grader qual JMO
HCM2001   9
N an hour ago by ethan2011
i mean.. whattttt??? just found out about this.. is he on aops? (i'm sure he is) where are you orz lol..
https://www.mathschool.com/blog/results/celebrating-success-douglas-zhang-is-rsm-s-youngest-usajmo-qualifier
9 replies
HCM2001
Today at 12:53 AM
ethan2011
an hour ago
36x⁴ + 12x² - 36x + 13 > 0
fxandi   3
N Today at 1:48 AM by fxandi
Prove that for any real $x \geq 0$ holds inequality $36x^4 + 12x^2 - 36x + 13 > 0.$
3 replies
fxandi
May 5, 2025
fxandi
Today at 1:48 AM
Weird integral
Martin.s   2
N Today at 12:43 AM by ADus
\[
\int_{-\frac{\pi}{2}}^{\frac{\pi}{2}} 
\frac{1 - e^{-2} \cos\left(2\left(u + \tan u\right)\right)}
{1 - 2e^{-2} \cos\left(2\left(u + \tan u\right)\right) + e^{-4}} 
\, \mathrm{d}u
\]
2 replies
Martin.s
May 20, 2025
ADus
Today at 12:43 AM
IMC 2018 P4
ThE-dArK-lOrD   18
N Yesterday at 8:50 PM by jonh_malkovich
Source: IMC 2018 P4
Find all differentiable functions $f:(0,\infty) \to \mathbb{R}$ such that
$$f(b)-f(a)=(b-a)f’(\sqrt{ab}) \qquad \text{for all}\qquad a,b>0.$$
Proposed by Orif Ibrogimov, National University of Uzbekistan
18 replies
ThE-dArK-lOrD
Jul 24, 2018
jonh_malkovich
Yesterday at 8:50 PM
convergence
Soupboy0   2
N Yesterday at 6:33 PM by fruitmonster97
If the function $\zeta(n) = \frac{1}{1^n}+\frac{1}{2^n}+\frac{1}{3^n}+....$ diverges for $n=1$ (harmonic sequence) but converges for $n=2$ because $\frac{\pi^2}{6}$, is there a value between $n=1$ and $n=2$ such that $\zeta(n)$ converges

(i dont know the answer could someone please help me)
2 replies
Soupboy0
Yesterday at 6:13 PM
fruitmonster97
Yesterday at 6:33 PM
a^2=3a+2imatrix 2*2
zolfmark   3
N Yesterday at 2:00 PM by Mathzeus1024
A
matrix 2*2

A^2=3A+2i
A^3=mA+Li


i means identity matrix,

find constant m ، L
3 replies
zolfmark
Feb 23, 2019
Mathzeus1024
Yesterday at 2:00 PM
polynomial having a simple root
FFA21   1
N Yesterday at 1:59 PM by Doru2718
Source: MSU algebra olympiad 2025 P4
$f(x)\in R[x]$ show that $f(x)+i$ has at least one root of multiplicity one
1 reply
FFA21
May 20, 2025
Doru2718
Yesterday at 1:59 PM
non-solvable group has subgroup that is not isomorphic to any normal subgroup
FFA21   1
N Yesterday at 1:45 PM by Doru2718
Source: MSU algebra olympiad 2025 P7
Show that in every finite non-solvable group there is a subgroup that is not isomorphic to any normal subgroup
1 reply
FFA21
May 20, 2025
Doru2718
Yesterday at 1:45 PM
Reduction coefficient
zolfmark   1
N Yesterday at 1:26 PM by Mathzeus1024

find Reduction coefficient of x^10

in(1+x-x^2)^9
1 reply
zolfmark
Jul 17, 2016
Mathzeus1024
Yesterday at 1:26 PM
Metric space
wiseman   3
N Yesterday at 10:33 AM by alinazarboland
Source: IMS 2014 - Day1 - Problem4
Let $(X,d)$ be a metric space and $f:X \to X$ be a function such that $\forall x,y\in X : d(f(x),f(y))=d(x,y)$.
$\text{a})$ Prove that for all $x \in X$, $\lim_{n \rightarrow +\infty} \frac{d(x,f^n(x))}{n}$ exists, where $f^n(x)$ is $\underbrace{f(f(\cdots f(x)}_{n \text{times}} \cdots ))$.
$\text{b})$ Prove that the amount of the limit does not depend on choosing $x$.
3 replies
wiseman
Oct 2, 2014
alinazarboland
Yesterday at 10:33 AM
Double integration
Tricky123   2
N Yesterday at 9:34 AM by Mathzeus1024
Q)
\[\iint_{R} \sin(xy) \,dx\,dy, \quad R = \left[0, \frac{\pi}{2}\right] \times \left[0, \frac{\pi}{2}\right]\]
How to solve the problem like this I am using the substitution method but its seems like very complicated in the last
Please help me
2 replies
Tricky123
May 18, 2025
Mathzeus1024
Yesterday at 9:34 AM
Classic Triangle Area problem
rnatog337   12
N Apr 25, 2025 by Ilikeminecraft
Source: 2024 AMC 8 P11
The coordinates of $\triangle ABC$ are $A(5, 7)$, $B(11, 7)$, $C(3, y)$, with $y > 7$. The area of $\triangle ABC$ is $12$. What is the value of $y$?

IMAGE

$\textbf{(A) } 8\qquad\textbf{(B) } 9\qquad\textbf{(C) } 10\qquad\textbf{(D) } 11\qquad\textbf{(E) } 12$
12 replies
rnatog337
Jan 25, 2024
Ilikeminecraft
Apr 25, 2025
Classic Triangle Area problem
G H J
G H BBookmark kLocked kLocked NReply
Source: 2024 AMC 8 P11
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rnatog337
410 posts
#1 • 1 Y
Y by Rounak_iitr
The coordinates of $\triangle ABC$ are $A(5, 7)$, $B(11, 7)$, $C(3, y)$, with $y > 7$. The area of $\triangle ABC$ is $12$. What is the value of $y$?

[asy]
size(10cm);
draw((5,7)--(11,7)--(3,11)--cycle);
label("$A(5,7)$", (5,7),S);
label("$B(11,7)$", (11,7),S);
label("$C(3,y)$", (3,11),W);
[/asy]

$\textbf{(A) } 8\qquad\textbf{(B) } 9\qquad\textbf{(C) } 10\qquad\textbf{(D) } 11\qquad\textbf{(E) } 12$
This post has been edited 2 times. Last edited by rnatog337, Jan 25, 2024, 5:45 PM
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sharknavy75
702 posts
#2
Y by
i got
D) 11
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rnatog337
410 posts
#3
Y by
Yes, I also got D.

Solution
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Countmath1
180 posts
#4
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This post has been edited 1 time. Last edited by Countmath1, Jan 25, 2024, 4:57 PM
Reason: left overleaf formatting in
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baassid24
196 posts
#5
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ultimatehero
299 posts
#6
Y by
Or you can shoelace this, and then solve for y.
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DuoDuoling0
3865 posts
#7
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Solution
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JH_K2IMO
128 posts
#8
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The length of the segment AB is 6.
The height of this triangle is (12 x 2/6) =4.
The answer is (D) 11.
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AbhayAttarde01
1494 posts
#11
Y by
xTimmyG wrote:
wow this is very difficult for a p11, i wasn't able to solve it. here is what i tried:

the segment AB looks like it is 6 long. because 12 and 6 have multiples of 6, i guessed E.

hint
find the height of CA (not slant height, but a straight line from C to the horizontal line where A is) and make y so that the equation will give you an area of 12
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ethanzhang1001
1060 posts
#12
Y by
AbhayAttarde01 wrote:
xTimmyG wrote:
wow this is very difficult for a p11, i wasn't able to solve it. here is what i tried:

the segment AB looks like it is 6 long. because 12 and 6 have multiples of 6, i guessed E.

hint
find the height of CA (not slant height, but a straight line from C to the horizontal line where A is) and make y so that the equation will give you an area of 12

bro didn't see the user bruh
they clearly knows how to solve it but they're trying to "prove a point" by acting stupid "like us" (supposedly)
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vsarg
289 posts
#13
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sol
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Scilyse
387 posts
#14
Y by
should've made 4 an option smh
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Ilikeminecraft
658 posts
#15
Y by
Solved with ST2009 and Awesomeness_in_a_bun
@above I agree

notice that the base is length 6. thus, the height from $C$ to $AB$ is $\frac{12}{6}\cdot2 = 4.$ thus, $4 + 7 = 11$ equivalent to $D.$
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