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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.

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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]
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0 replies
jlacosta
Mar 2, 2025
0 replies
My MATHCOUNTS journey + I need advice
nitride   18
N 3 minutes ago by weihou0
So I don't really care if I dox myself but I went to one of the single worst chapters in all of Florida, the Indian river chapter(even the runner of mathcounts states was sayin we would lose to osprey in states). I don't exactly know what my score is, but all I know is that I got 1st place sprint and chapter but then sold CD. If I had to guess, my score was around the 30-37 range. I also mocked at around a 70 on amc 10. My questions are:
1.
What are my chances of me getting nats qual
2.
Should I study the day before the competition
18 replies
nitride
Today at 1:36 AM
weihou0
3 minutes ago
Calculator
junlongsun   9
N 22 minutes ago by FerociousPuma66
I have a Casio FX-9750GIII

I can't seem to get the equation solver to work, I'm mainly afraid of something similar to Chapter T8 appearing on states.

$y^2=1025-40x$
$x^2=1025-50y$

Does anyone with the model know how to get the calculator to solve the equation above?

Thanks
9 replies
junlongsun
Today at 2:37 AM
FerociousPuma66
22 minutes ago
mathcounts advice pls
muuheng   3
N 25 minutes ago by FerociousPuma66
hi i have around 9 days until my state round competition, and my chapter score was 32. My state isn't that competitive, so i think the cutoff for nats last year was like 31, and i scored second in my chapter but i'm from a less competitive chapter. I think tenth place this year for the most competitive chapter in my state got 34? (as well as 11th thru maybe 20th place). So can anyone whose like orz give me like advice on how to lock in 9 days so maybe i can make it to state top 10 or maybe even nationals (i'm only hoping for top 10 but any help is appreciated :love: ). also anyone wanna guess my state for fun. and maybe if you've taken the state yet tell me how it went pretty pls
3 replies
1 viewing
muuheng
Today at 5:45 AM
FerociousPuma66
25 minutes ago
AMC8 Honor Roll out??
LittleBacat   77
N 2 hours ago by GYRAD0S
I searched up the honor roll number today for Amc8 2025, and it says that (in the AoPS WIKI), https://artofproblemsolving.com/wiki/index.php/AMC_historical_results?srsltid=AfmBOoopyoLrmVTtrMLZRTlATAWrzQzjFDBrN-rg_zhAloy8H5YkhjHb)
-Honor Roll: 19
-Average: 11.74
-Top 2.5: 21
-Distinguished Honor Roll: 23.
I think this is correct! So like idk what did y'all get?
77 replies
LittleBacat
Feb 25, 2025
GYRAD0S
2 hours ago
Weird family of sequences
AndreiVila   6
N 2 hours ago by Filipjack
Source: Romanian District Olympiad 2025 12.3
[list=a]
[*] Let $a<b$ and $f:[a,b]\rightarrow\mathbb{R}$ be a strictly monotonous function such that $\int_a^b f(x) dx=0$. Show that $f(a)\cdot f(b)<0$.
[*] Find all convergent sequences $(a_n)_{n\geq 1}$ for which there exists a scrictly monotonous function $f:\mathbb{R}\rightarrow\mathbb{R}$ such that $$\int_{a_{n-1}}^{a_n} f(x)dx = \int_{a_n}^{a_{n+1}} f(x)dx,\text{ for all }n\geq 2.$$
6 replies
AndreiVila
Mar 8, 2025
Filipjack
2 hours ago
Generating functions and recursions smelling from 1000 km
Assassino9931   12
N 2 hours ago by sangsidhya
Source: IMC 2022 Day 1 Problem 3
Let $p$ be a prime number. A flea is staying at point $0$ of the real line. At each minute,
the flea has three possibilities: to stay at its position, or to move by $1$ to the left or to the right.
After $p-1$ minutes, it wants to be at $0$ again. Denote by $f(p)$ the number of its strategies to do this
(for example, $f(3) = 3$: it may either stay at $0$ for the entire time, or go to the left and then to the
right, or go to the right and then to the left). Find $f(p)$ modulo $p$.
12 replies
Assassino9931
Aug 5, 2022
sangsidhya
2 hours ago
Proof of a limit
Alphaamss   4
N 4 hours ago by Alphaamss
Suppose $\{a_n\}$ and $\{b_n\}$ are two positive sequences and
$$\lim_{n\to\infty}a_n=\lim_{n\to\infty}b_n=a\in(1,\infty).$$Prove that $$\lim_{n\to\infty}\frac1n\log\left[1+\left(\frac{b_n}{a_n}\right)^n\right]=0.$$I can prove it by $\epsilon-N$ method, I want to know if there is another method!
4 replies
Alphaamss
Yesterday at 5:29 AM
Alphaamss
4 hours ago
Simple limit with standard recurrence
AndreiVila   2
N 6 hours ago by realmadridfan
Source: Romanian District Olympiad 2025 11.1
Consider the sequence $(a_n)_{n\geq 1}$ given by $a_1=1$ and $a_{n+1}=\frac{a_n}{1+\sqrt{1+a_n}}$, for all $n\geq 1$. Show that $$\lim_{n\rightarrow\infty}\frac{a_{n+1}}{a_n} = \lim_{n\rightarrow\infty}\sum_{k=1}^n \log_2(1+a_k)=2.$$Mathematical Gazette
2 replies
AndreiVila
Mar 8, 2025
realmadridfan
6 hours ago
Limiting value
Tricky123   7
N 6 hours ago by realmadridfan
Q) find $\lim_{n\to\infty} nx^{n}(1-x)$ $\forall x\in(0,1)$

How to solve please help
7 replies
Tricky123
Mar 9, 2025
realmadridfan
6 hours ago
Do these have a closed form?
Entrepreneur   1
N 6 hours ago by realmadridfan
Source: Own
$$\int_0^\infty\frac{t^{n-1}}{(t+\alpha)^2+m^2}dt.$$$$\int_0^\infty\frac{e^{nt}}{(t+\alpha)^2+m^2}dt.$$
1 reply
Entrepreneur
Tuesday at 2:03 PM
realmadridfan
6 hours ago
Putnam 1963 B3
sqrtX   4
N 6 hours ago by realmadridfan
Source: Putnam 1963
Find every twice-differentiable function $f: \mathbb{R} \rightarrow \mathbb{R}$ that satisfies the functional equation
$$ f(x)^2 -f(y)^2 =f(x+y)f(x-y)$$for all $x,y \in \mathbb{R}. $
4 replies
sqrtX
May 1, 2022
realmadridfan
6 hours ago
ISI 2024 P1
MrOreoJuice   7
N 6 hours ago by realmadridfan
Find, with proof, all possible values of $t$ such that
\[\lim_{n \to \infty} \left( \frac{1 + 2^{1/3} + 3^{1/3} + \dots + n^{1/3}}{n^t} \right ) = c\]for some real $c>0$. Also find the corresponding values of $c$.
7 replies
MrOreoJuice
May 12, 2024
realmadridfan
6 hours ago
ISI 2018 #3
integrated_JRC   34
N Today at 7:08 AM by anudeep
Source: ISI 2018 B.Stat / B.Math Entrance Exam
Let $f:\mathbb{R}\to\mathbb{R}$ be a continuous function such that for all $x\in\mathbb{R}$ and for all $t\geqslant 0$, $$f(x)=f(e^tx)$$Show that $f$ is a constant function.
34 replies
integrated_JRC
May 13, 2018
anudeep
Today at 7:08 AM
Integration Bee Kaizo
Calcul8er   40
N Today at 7:07 AM by Figaro
Hey integration fans. I decided to collate some of my favourite and most evil integrals I've written into one big integration bee problem set. I've been entering integration bees since 2017 and I've been really getting hands on with the writing side of things over the last couple of years. I hope you'll enjoy!
40 replies
Calcul8er
Mar 2, 2025
Figaro
Today at 7:07 AM
My MATHCOUNTS journey + I need advice
G H J
G H BBookmark kLocked kLocked NReply
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nitride
554 posts
#1
Y by
So I don't really care if I dox myself but I went to one of the single worst chapters in all of Florida, the Indian river chapter(even the runner of mathcounts states was sayin we would lose to osprey in states). I don't exactly know what my score is, but all I know is that I got 1st place sprint and chapter but then sold CD. If I had to guess, my score was around the 30-37 range. I also mocked at around a 70 on amc 10. My questions are:
1.
What are my chances of me getting nats qual
2.
Should I study the day before the competition
Z K Y
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juicetin.kim
2478 posts
#2 • 3 Y
Y by ibmo0907, Amazong, aidan0626
nitride wrote:
even the runner of mathcounts states was sayin we would lose to osprey in states

as a mathcounts competitor from an osprey school, i am deeply offended
Z K Y
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gavinhaominwang
64 posts
#3
Y by
The cutoffs for nationals in Florida was 34 last year and 37 the year before. Your chances are slim to near 0 given your chapter score.
This post has been edited 1 time. Last edited by gavinhaominwang, Today at 1:49 AM
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junlongsun
63 posts
#4
Y by
nitride wrote:
So I don't really care if I dox myself but I went to one of the single worst chapters in all of Florida, the Indian river chapter(even the runner of mathcounts states was sayin we would lose to osprey in states). I don't exactly know what my score is, but all I know is that I got 1st place sprint and chapter but then sold CD. If I had to guess, my score was around the 30-37 range. I also mocked at around a 70 on amc 10. My questions are:
1.
What are my chances of me getting nats qual
2.
Should I study the day before the competition

If you get lucky\
Z K Y
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nitride
554 posts
#5
Y by
juicetin.kim wrote:
nitride wrote:
even the runner of mathcounts states was sayin we would lose to osprey in states

as a mathcounts competitor from an osprey school, i am deeply offended

my apologies
Z K Y
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nitride
554 posts
#6
Y by
gavinhaominwang wrote:
The cutoffs for nationals in Florida was 34 last year and 37 the year before. Your chances are slim to near 0 given your chapter score.

given my current prediction my score is a 38
so yeah im cooked
Z K Y
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aoh11
155 posts
#8
Y by
is state round harder than chapter round
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jkim0656
217 posts
#9
Y by
yep!
get harder the more up u go :nhl:
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aoh11
155 posts
#10
Y by
what will i get at states
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jkim0656
217 posts
#11
Y by
i hope u do well!
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aoh11
155 posts
#12
Y by
people say i have a 0 percent chance at making nationals :(
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aoh11
155 posts
#13
Y by
Also do you know how to get a rating in ftw? Is a rating of 100 good, and is a red cube good in ftw
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jkim0656
217 posts
#14
Y by
idk a lot abt ftw, but i know u have to be a golden shape (icosahedron?) to see rating i think
correct me if im wrong but 100 isn't that good...but don't listen to me whos only played a couple ftws in my life :)
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aoh11
155 posts
#15
Y by
Ok thank you, i will get a rating as soon as the ftw maintence break is done
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aoh11
155 posts
#16
Y by
is a 37.5 on amc10 good and a 10 on amc8 good btw
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sadas123
911 posts
#17
Y by
aoh11 wrote:
is a 37.5 on amc10 good and a 10 on amc8 good btw

Yes that is really good! This year I scored a 12 on the AMC 10 and I am so happy and I guessed 1 question right on the AMC 8 to get a 1 on it. What do you think my chances for USAJMO Qual is ??!!!!!!!!
Z K Y
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aoh11
155 posts
#18
Y by
0 because a 12 didn't make aime this year
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aoh11
155 posts
#19
Y by
I knew you are really good at ftw sadas123!!!!! how are you so good?

It says you are 11th Place FTW Hall of Fame
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weihou0
26 posts
#20
Y by
sadas123 wrote:
aoh11 wrote:
is a 37.5 on amc10 good and a 10 on amc8 good btw

Yes that is really good! This year I scored a 12 on the AMC 10 and I am so happy and I guessed 1 question right on the AMC 8 to get a 1 on it. What do you think my chances for USAJMO Qual is ??!!!!!!!!

Yo chill out bro
I think this is a legitimate person asking for advice
Maybe i'm wrong tho
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