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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.

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]
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0 replies
jlacosta
Mar 2, 2025
0 replies
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The Real Deal: Looking for Writers!
supercheetah11   6
N 7 minutes ago by anticodon
Hello AoPS!

My name is James, and I am the editor of a math newsletter by and for kids titled "The Real Deal: A Complex Space for Kids to Discuss Math". I am looking for a few more writers willing to write an article about their favorite math problem for the coming, 6th edition of the newsletter (articles should be about 600-800 words). We have a growing readership (around 3K), and you can know that your writing will be shared with kids all over the world who also love math. If you're interested, please write me at therealdealmath@gmail.com. You can read previous issues of the newsletter at http://www.realdealmath.org.

Thank you!
6 replies
supercheetah11
3 hours ago
anticodon
7 minutes ago
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AMC 8 Help
krish6_9   32
N 20 minutes ago by stjwyl
Hey guys
im in new jersey a third grader who got 12 on amc 8. I want to make mop in high school and mathcounts nationals in 6th grade is that realistic how should I get better
32 replies
krish6_9
Mar 17, 2025
stjwyl
20 minutes ago
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Factoring Marathon
pican   1435
N 4 hours ago by valenbb
Hello guys,
I think we should start a factoring marathon. Post your solutions like this SWhatever, and your problems like this PWhatever. Please make your own problems, and I'll start off simple: P1
1435 replies
+1 w
pican
Aug 4, 2015
valenbb
4 hours ago
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Mathcounts state iowa
iwillregretthisnamelater   10
N 5 hours ago by DDCN_2011
Ok I’m a 6th grader in Iowa who got 38 in chapter which was first, so what are the chances of me getting in nats? I should feel confident but I don’t. I have a week until states and I’m getting really anxious. What should I do? And also does the cdr count in Iowa? Because I heard that some states do cdr for fun or something and that it doesn’t count to final standings.
10 replies
iwillregretthisnamelater
Yesterday at 4:55 AM
DDCN_2011
5 hours ago
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Inequalities
sqing   0
6 hours ago
Let $ a,b,c\geq 0 $ and $ a+b+c\geq 2+abc . $ Prove that
$$a^2+b^2+c^2- \frac{2}{5}abc-\frac{1}{2}a^2b^2c^2\geq \frac{48}{25}$$$$a^2+b^2+c^2- \frac{3}{5}abc-\frac{1}{2}a^2b^2c^2\geq \frac{91}{50}$$$$a^2+b^2+c^2- \frac{4}{5}abc-\frac{1}{2}a^2b^2c^2\geq \frac{42}{25}$$$$a^2+b^2+c^2- \frac{8}{5}abc-\frac{1}{2}a^2b^2c^2\geq \frac{3(7\sqrt{21}-27)}{25}$$$$a^2+b^2+c^2- \frac{9}{5}abc-\frac{1}{2}a^2b^2c^2\geq \frac{8}{261+41 \sqrt{41}}$$
0 replies
sqing
6 hours ago
0 replies
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Inequalities
sqing   29
N Today at 1:20 PM by SomeonecoolLovesMaths
Let $ a,b>0 $ and $ \frac{1}{a}+\frac{1}{b}=1. $ Prove that
$$(a^2-a+1)(b^2-b+1) \geq 9$$$$ (a^2-a+b+1)(b^2-b+a+1) \geq 25$$Let $ a,b>0 $ and $ \frac{1}{a}+\frac{1}{b}=\frac{2}{3}. $ Prove that
$$(a+8)(a^2-a+b+2)(b^2-b+5)\geq1331$$$$(a+10)(a^2-a+b+4)(b^2-b+7)\geq2197$$
29 replies
1 viewing
sqing
Mar 10, 2025
SomeonecoolLovesMaths
Today at 1:20 PM
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2019 Chile Classification / Qualifying NMO Juniors XXXI
parmenides51   6
N Today at 1:19 PM by bhontu
p1. Consider the sequence of positive integers $2, 3, 5, 6, 7, 8, 10, 11 ...$. which are not perfect squares. Calculate the $2019$-th term of the sequence.


p2. In a triangle $ABC$, let $D$ be the midpoint of side $BC$ and $E$ be the midpoint of segment $AD$. Lines $AC$ and $BE$ intersect at $F$. Show that $3AF = AC$.


p3. Find all positive integers $n$ such that $n! + 2019$ is a square perfect.


p4. In a party, there is a certain group of people, none of whom has more than $3$ friends in this. However, if two people are not friends at least they have a friend in this party. What is the largest possible number of people in the party?
6 replies
parmenides51
Oct 11, 2021
bhontu
Today at 1:19 PM
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Inequalities
sqing   12
N Today at 1:12 PM by sqing
Let $ a,b $ be real numbers such that $ a + b \geq |ab + 1|. $ Prove that$$ a^3 + b^3 \geq |a^3 b^3 + 1|$$Let $ a,b $ be real numbers such that $ 2(a + b ) \geq |ab + 1|. $ Prove that$$26( a^3 + b^3) \geq |a^3 b^3 + 1|$$Let $ a,b $ be real numbers such that $ 4(a + b) \geq 3|ab + 1|. $ Prove that$$148(a^3 + b^3) \geq27 |a^3 b^3 + 1|$$
12 replies
sqing
Mar 8, 2025
sqing
Today at 1:12 PM
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FB = BK , circumcircle and altitude related (In the World of Mathematics 516)
parmenides51   3
N Today at 12:09 PM by AshAuktober
Let $BT$ be the altitude and $H$ be the intersection point of the altitudes of triangle $ABC$. Point $N$ is symmetric to $H$ with respect to $BC$. The circumcircle of triangle $ATN$ intersects $BC$ at points $F$ and $K$. Prove that $FB = BK$.

(V. Starodub, Kyiv)
3 replies
parmenides51
Apr 19, 2020
AshAuktober
Today at 12:09 PM
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Polynomial with roots in geometric progression
red_dog   0
Today at 9:54 AM
Let $f\in\mathbb{C}[X], \ f=aX^3+bX^2+cX+d, \ a,b,c,d\in\mathbb{R}^*$ a polynomial whose roots $x_1,x_2,x_3$ are in geometric progression with ration $q\in(0,\infty)$. Find $S_n=x_1^n+x_2^n+x_3^n$.
0 replies
red_dog
Today at 9:54 AM
0 replies
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Good Functional equation question
vexploresmathysics   1
N Today at 9:30 AM by jasperE3
If f : R^+ --> R^+ satisfying f(f(x)/y ) = yf ( y ) + (f(x)). Then the value of α such that Sigma K = 1 to n [ 1 / f(K) ] = 420
1 reply
vexploresmathysics
Jul 1, 2024
jasperE3
Today at 9:30 AM
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Functional Equation
AnhQuang_67   2
N Today at 9:03 AM by jasperE3
Find all function $f: \mathbb{R} \rightarrow \mathbb{R}$ satisfying:
$$3f(\dfrac{x-1}{3x+2})-5f(\dfrac{1-x}{x-2})=\dfrac{8}{x-1}, \forall x \notin \{0,\dfrac{-2}{3},1,2\}$$
2 replies
AnhQuang_67
Jan 7, 2025
jasperE3
Today at 9:03 AM
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a+b+c=3 ine
jokehim   4
N Today at 8:26 AM by lbh_qys
Problem. Given non-negative real numbers $a,b,c$ satisfying $a+b+c=3.$ Prove that $$\color{black}{\frac{a\left(b+c\right)}{bc+3}+\frac{b\left(c+a\right)}{ca+3}+\frac{c\left(a+b\right)}{ab+3}\le \frac{3}{2}.}$$Proposed by Phan Ngoc Chau
4 replies
jokehim
Mar 18, 2025
lbh_qys
Today at 8:26 AM
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IOQM P5 2024
SomeonecoolLovesMaths   13
N Today at 8:10 AM by quasar_lord
Let $a = \frac{x}{y} +\frac{y}{z} +\frac{z}{x}$, let $b = \frac{x}{z} +\frac{y}{x} +\frac{z}{y}$ and let $c = \left(\frac{x}{y} +\frac{y}{z} \right)\left(\frac{y}{z} +\frac{z}{x} \right)\left(\frac{z}{x} +\frac{x}{y} \right)$. The value of $|ab-c|$ is:
13 replies
SomeonecoolLovesMaths
Sep 8, 2024
quasar_lord
Today at 8:10 AM
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Why was this poll blocked
jkim0656   11
N Today at 2:44 PM by skronkmonster
Hey AoPS ppl!
I made a poll about Pi vs Tau over here:
https://artofproblemsolving.com/community/c3h3527460
But after a few days it got blocked but i don't get why?
how is this harmful or different from other polls?
It really wasn't that harmful or popular i got to say tho... :noo:
11 replies
jkim0656
Mar 18, 2025
skronkmonster
Today at 2:44 PM
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Why was this poll blocked
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Reveal topic tags
poll
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jkim0656
297 posts
jkim0656
#1 h  Mar 18, 2025, 10:51 PM
Y by
Hey AoPS ppl!
I made a poll about Pi vs Tau over here:
https://artofproblemsolving.com/community/c3h3527460
But after a few days it got blocked but i don't get why?
how is this harmful or different from other polls?
It really wasn't that harmful or popular i got to say tho... :noo:
This post has been edited 1 time. Last edited by jkim0656, Mar 18, 2025, 10:51 PM
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wonderfulJ
56 posts
wonderfulJ
#2 h  Mar 18, 2025, 10:53 PM
Y by
Just make another one and let people know that
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jkim0656
297 posts
jkim0656
#3 h  Mar 18, 2025, 10:55 PM
Y by
wonderfulJ wrote:
Just make another one and let people know that

won't it just get blocked again?
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jkim0656
297 posts
jkim0656
#4 h  Mar 19, 2025, 1:54 AM
Y by
/bumpppp
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sadas123
1066 posts
sadas123
#5 h  Mar 19, 2025, 2:09 AM
Y by
more of a question for site support.
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MathRook7817
614 posts
MathRook7817
#6 h  Mar 19, 2025, 2:43 AM
Y by
bruh yeah i made a wrong answers only thing and it got locked for some reason too
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MochaGirl
5 posts
MochaGirl
#7 h  Yesterday at 1:36 AM
Y by
I can still access the poll. I clicked the link and saw it.
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ChocolateEruption
13 posts
ChocolateEruption
#8 h  Yesterday at 1:40 AM
Y by
jkim0656 wrote:
Hey AoPS ppl!
I made a poll about Pi vs Tau over here:
https://artofproblemsolving.com/community/c3h3527460
But after a few days it got blocked but i don't get why?
how is this harmful or different from other polls?
It really wasn't that harmful or popular i got to say tho... :noo:

maybe because someone said all polls die
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dragonborn56
1495 posts
dragonborn56
#9 h  Yesterday at 11:43 AM
Y by
jkim0656 wrote:
Hey AoPS ppl!
I made a poll about Pi vs Tau over here:
https://artofproblemsolving.com/community/c3h3527460
But after a few days it got blocked but i don't get why?
how is this harmful or different from other polls?
It really wasn't that harmful or popular i got to say tho... :noo:

Read the thread. The posts were either low word count posts(such as "Pi" or "Tau" with no other text) in this math forum that counts posts, or the argument that the thread eventually became.You seem relatively new, so you should learn that not all threads succeed, and your poll was probably not suitable for Middle School Math in the first place.
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Andyluo
856 posts
Andyluo
#10 h  Yesterday at 12:04 PM
Y by
someone also did that with the mathcounts state thread for no reason. Please repost it whoever made it
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iwastedmyusername
29 posts
iwastedmyusername
#11 h  Yesterday at 2:16 PM
Y by
I think it was because people were sharing their scores
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skronkmonster
2165 posts
skronkmonster
#12 h  Today at 2:44 PM
Y by
iwastedmyusername wrote:
I think it was because people were sharing their scores

the discussion was also beginning to spiral downwards. threads that turn into fuel to arguments arre often locked
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