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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
k i Adding contests to the Contest Collections
dcouchman   1
N Apr 5, 2023 by v_Enhance
Want to help AoPS remain a valuable Olympiad resource? Help us add contests to AoPS's Contest Collections.

Find instructions and a list of contests to add here: https://artofproblemsolving.com/community/c40244h1064480_contests_to_add
1 reply
dcouchman
Sep 9, 2019
v_Enhance
Apr 5, 2023
k i Zero tolerance
ZetaX   49
N May 4, 2019 by NoDealsHere
Source: Use your common sense! (enough is enough)
Some users don't want to learn, some other simply ignore advises.
But please follow the following guideline:


To make it short: ALWAYS USE YOUR COMMON SENSE IF POSTING!
If you don't have common sense, don't post.


More specifically:

For new threads:


a) Good, meaningful title:
The title has to say what the problem is about in best way possible.
If that title occured already, it's definitely bad. And contest names aren't good either.
That's in fact a requirement for being able to search old problems.

Examples:
Bad titles:
- "Hard"/"Medium"/"Easy" (if you find it so cool how hard/easy it is, tell it in the post and use a title that tells us the problem)
- "Number Theory" (hey guy, guess why this forum's named that way¿ and is it the only such problem on earth¿)
- "Fibonacci" (there are millions of Fibonacci problems out there, all posted and named the same...)
- "Chinese TST 2003" (does this say anything about the problem¿)
Good titles:
- "On divisors of a³+2b³+4c³-6abc"
- "Number of solutions to x²+y²=6z²"
- "Fibonacci numbers are never squares"


b) Use search function:
Before posting a "new" problem spend at least two, better five, minutes to look if this problem was posted before. If it was, don't repost it. If you have anything important to say on topic, post it in one of the older threads.
If the thread is locked cause of this, use search function.

Update (by Amir Hossein). The best way to search for two keywords in AoPS is to input
[code]+"first keyword" +"second keyword"[/code]
so that any post containing both strings "first word" and "second form".


c) Good problem statement:
Some recent really bad post was:
[quote]$lim_{n\to 1}^{+\infty}\frac{1}{n}-lnn$[/quote]
It contains no question and no answer.
If you do this, too, you are on the best way to get your thread deleted. Write everything clearly, define where your variables come from (and define the "natural" numbers if used). Additionally read your post at least twice before submitting. After you sent it, read it again and use the Edit-Button if necessary to correct errors.


For answers to already existing threads:


d) Of any interest and with content:
Don't post things that are more trivial than completely obvious. For example, if the question is to solve $x^{3}+y^{3}=z^{3}$, do not answer with "$x=y=z=0$ is a solution" only. Either you post any kind of proof or at least something unexpected (like "$x=1337, y=481, z=42$ is the smallest solution). Someone that does not see that $x=y=z=0$ is a solution of the above without your post is completely wrong here, this is an IMO-level forum.
Similar, posting "I have solved this problem" but not posting anything else is not welcome; it even looks that you just want to show off what a genius you are.

e) Well written and checked answers:
Like c) for new threads, check your solutions at least twice for mistakes. And after sending, read it again and use the Edit-Button if necessary to correct errors.



To repeat it: ALWAYS USE YOUR COMMON SENSE IF POSTING!


Everything definitely out of range of common sense will be locked or deleted (exept for new users having less than about 42 posts, they are newbies and need/get some time to learn).

The above rules will be applied from next monday (5. march of 2007).
Feel free to discuss on this here.
49 replies
ZetaX
Feb 27, 2007
NoDealsHere
May 4, 2019
Calculus
youochange   12
N 44 minutes ago by FriendPotato
Find the area enclosed by the curves $e^x,e^{-x},x^2+y^2=1$
12 replies
youochange
Yesterday at 2:38 PM
FriendPotato
44 minutes ago
The familiar right angle from the orthocenter
buratinogigle   2
N an hour ago by jainam_luniya
Source: Own, HSGSO P6
Let $ABC$ be a triangle inscribed in a circle $\omega$ with orthocenter $H$ and altitude $BE$. Let $M$ be the midpoint of $AH$. Line $BM$ meets $\omega$ again at $P$. Line $PE$ meets $\omega$ again at $Q$. Let $K$ be the orthogonal projection of $E$ on the line $BC$. Line $QK$ meets $\omega$ again at $G$. Prove that $GA\perp GH$.
2 replies
buratinogigle
3 hours ago
jainam_luniya
an hour ago
a deep thinking topic. either useless or extraordinary , not yet disovered
jainam_luniya   5
N an hour ago by jainam_luniya
Source: 1.99999999999....................................................................1. it this possible or not we can debate
it can be a new discovery in world or NT
5 replies
jainam_luniya
an hour ago
jainam_luniya
an hour ago
Discover the Future of Coding with WeNextCoder – Your Ultimate Programming Resou
nextcoder   0
an hour ago
If you're passionate about technology, programming, or building a career in the digital world, look no further than WeNextCoder.com. This dynamic platform is designed for learners, developers, and tech enthusiasts who want to stay ahead in an ever-evolving industry. Whether you're just starting your journey into coding or you're an experienced developer seeking to expand your skill set, WeNextCoder offers a wide array of resources tailored to every level.

From in-depth tutorials on popular programming languages like Python, JavaScript, and Java to full-stack project guides, real-world coding challenges, and tips for tech interviews, the site provides everything you need to succeed. It also covers the latest trends in web development, artificial intelligence, cloud computing, and more, ensuring you're always up-to-date with what's happening in the tech world.

One of the standout features of WeNextCoder is its beginner-friendly approach, making complex topics easy to understand without watering them down. Plus, the platform's clean interface and organized content make navigation a breeze.

Visit https://wenextcoder.com/ today and take the next step in your programming journey. Empower yourself with the knowledge and tools to build a brighter future in tech.
0 replies
nextcoder
an hour ago
0 replies
Divisibilty...
Sadigly   4
N an hour ago by jainam_luniya
Source: Azerbaijan Junior NMO 2025 P2
Find all $4$ consecutive even numbers, such that the sum of their squares divides the square of their product.
4 replies
+1 w
Sadigly
Yesterday at 9:07 PM
jainam_luniya
an hour ago
ioqm to imo journey
jainam_luniya   2
N an hour ago by jainam_luniya
only imginative ones are alloud .all country and classes or even colleges
2 replies
jainam_luniya
an hour ago
jainam_luniya
an hour ago
Inequality
Sadigly   5
N an hour ago by jainam_luniya
Source: Azerbaijan Junior MO 2025 P5
For positive real numbers $x;y;z$ satisfying $0<x,y,z<2$, find the biggest value the following equation could acquire:


$$(2x-yz)(2y-zx)(2z-xy)$$
5 replies
Sadigly
May 9, 2025
jainam_luniya
an hour ago
D'B, E'C and l are congruence.
cronus119   7
N an hour ago by Tkn
Source: 2022 Iran second round mathematical Olympiad P1
Let $E$ and $F$ on $AC$ and $AB$ respectively in $\triangle ABC$ such that $DE || BC$ then draw line $l$ through $A$ such that $l || BC$ let $D'$ and $E'$ reflection of $D$ and $E$ to $l$ respectively prove that $D'B, E'C$ and $l$ are congruence.
7 replies
1 viewing
cronus119
May 22, 2022
Tkn
an hour ago
a set of $9$ distinct integers
N.T.TUAN   17
N an hour ago by hlminh
Source: APMO 2007
Let $S$ be a set of $9$ distinct integers all of whose prime factors are at most $3.$ Prove that $S$ contains $3$ distinct integers such that their product is a perfect cube.
17 replies
N.T.TUAN
Mar 31, 2007
hlminh
an hour ago
Asymmetric FE
sman96   13
N 2 hours ago by youochange
Source: BdMO 2025 Higher Secondary P8
Find all functions $f: \mathbb{R} \to \mathbb{R}$ such that$$f(xf(y)-y) + f(xy-x) + f(x+y) = 2xy$$for all $x, y \in \mathbb{R}$.
13 replies
sman96
Feb 8, 2025
youochange
2 hours ago
Divisibility NT
reni_wee   1
N 2 hours ago by Pal702004
Source: Iran 1998
Suppose that $a$ and $b$ are natural numbers such that
$$p = \frac{b}{4}\sqrt{\frac{2a-b}{2a+b}}$$is a prime number. Find all possible values of $a$,$b$,$p$.
1 reply
reni_wee
4 hours ago
Pal702004
2 hours ago
MATHCOUNTS
ILOVECATS127   34
N 4 hours ago by ILOVECATS127
Hi,

I am looking to get on my school MATHCOUNTS team next year in 7th grade, and I had a question: Where do the school round questions come from? (Sprint, Chapter, Team, Countdown)
34 replies
ILOVECATS127
May 7, 2025
ILOVECATS127
4 hours ago
A container has $40$ liters of milk. Then, $4$ liters are removed from the cont
Vulch   3
N 5 hours ago by evt917
A container has $40$ liters of milk. Then, $4$ liters are removed from the container and replaced with $4$ liters of water. This process of replacing $4$ liters of the liquid in the container with an equal volume of water is continued repeatedly. The smallest number of times of doing this process, after which the volume of milk in the container becomes less than that of water, is
3 replies
Vulch
Yesterday at 10:11 AM
evt917
5 hours ago
9 middle school olympiads forum ?
kjhgyuio   6
N Today at 2:35 AM by kjhgyuio
There is a high school olympiads forum,so I am thinking why is there no middle school olympiads forum Should i create a middle school olympiads forum ?
here is the link if you are interested ->https://artofproblemsolving.com/community/c4318171_middle_school_olympiads
6 replies
kjhgyuio
Today at 12:28 AM
kjhgyuio
Today at 2:35 AM
Mock Mathcounts Exam, anyone?
luppleAOPS   28
N Mar 15, 2025 by imtiyas1
I am currently in the process of making a Mock Mathcounts Sprint and Target Examination. The difficulty is about National difficulty, if not more difficult. PM if you are interested, and I will PM (and post) when my rounds are completed and for more details. PLEASE be patient, as it may take a while for me to finish. :D

But if you are interesting please PM and/or (but at least PM me to officially sign up) if you are interested.

Also note that I may not even finish it.

*Also you may need Word 2007 or higher to view some of the problems

*CHECK MY REVISED SAMPLE PROBLEMS OUT (if you scroll down)
28 replies
luppleAOPS
Mar 1, 2011
imtiyas1
Mar 15, 2025
Mock Mathcounts Exam, anyone?
G H J
G H BBookmark kLocked kLocked NReply
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luppleAOPS
70 posts
#1 • 2 Y
Y by Adventure10 and 1 other user
I am currently in the process of making a Mock Mathcounts Sprint and Target Examination. The difficulty is about National difficulty, if not more difficult. PM if you are interested, and I will PM (and post) when my rounds are completed and for more details. PLEASE be patient, as it may take a while for me to finish. :D

But if you are interesting please PM and/or (but at least PM me to officially sign up) if you are interested.

Also note that I may not even finish it.

*Also you may need Word 2007 or higher to view some of the problems

*CHECK MY REVISED SAMPLE PROBLEMS OUT (if you scroll down)
This post has been edited 2 times. Last edited by luppleAOPS, Mar 1, 2011, 2:52 AM
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chenboy3
329 posts
#2 • 2 Y
Y by Adventure10, Mango247
If you are going to upload the exams here then it would be best to convert to PDF files before uploading, as then almost everyone can view it. Just click "Save As", then select the PDF file mode.
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luppleAOPS
70 posts
#3 • 2 Y
Y by Adventure10, Mango247
okay thanks!
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luppleAOPS
70 posts
#4 • 2 Y
Y by Adventure10, Mango247
In fact, I have completed five sample questions, so you guys know a good idea of what's going to be on the mock :D

*EDIT: Question one should be ratio of x to v, not x to z
Attachments:
luppleMOCKsample.pdf (92kb)
This post has been edited 1 time. Last edited by luppleAOPS, Mar 1, 2011, 1:47 AM
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chenboy3
329 posts
#5 • 2 Y
Y by Adventure10, Mango247
Your #4 isn't too specific. It doesn't specify whether you use the numbers as digits or whether you can use operators, like $2+3=5$ and $6 \cdot 6=36$.
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luppleAOPS
70 posts
#6 • 2 Y
Y by Adventure10, Mango247
sorry, just using the numbers as digits
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luppleAOPS
70 posts
#7 • 2 Y
Y by Adventure10, Mango247
this one i just revised, may be more clear?
Attachments:
lupplemocksample1.pdf (100kb)
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chenboy3
329 posts
#8 • 2 Y
Y by Adventure10, Mango247
Yeah, that one is more clear and fixed the errors in #1 and 4
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luppleAOPS
70 posts
#9 • 2 Y
Y by Adventure10, Mango247
okay... since theres such a lack in interest i guess i wont be doing one unless more ppl pm me.

Are my questions bad or something? Or are people not willing to prepare for states...? Please tell me.
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minirafa
715 posts
#10 • 2 Y
Y by Adventure10, Mango247
btw, you might want to pm CRICKET229. he makes really good mock mc exams...
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Gnip-Gnop
531 posts
#11 • 2 Y
Y by Adventure10, Mango247
I want one!
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minirafa
715 posts
#12 • 1 Y
Y by Adventure10
then PM him!
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bluecarneal
9294 posts
#13 • 1 Y
Y by Adventure10
This is the one I was in.
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andrew99
397 posts
#14 • 2 Y
Y by Adventure10, Mango247
I guess I will join.
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luppleAOPS
70 posts
#15 • 2 Y
Y by Adventure10, Mango247
okay we have nine people so far, probably need at least twelve
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qqrules
4 posts
#16 • 2 Y
Y by Adventure10, Mango247
I'll join.
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anonymous0
455 posts
#17 • 2 Y
Y by Adventure10 and 1 other user
I'll join.
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andrew99
397 posts
#18 • 1 Y
Y by Adventure10
Are there going to be helpers?
and may I have it in word instead of pdf?
Thanks!
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luppleAOPS
70 posts
#19 • 2 Y
Y by Adventure10, Mango247
Sure, anyone who wants to be a helper can. If you are a helper you cannot participate. If you are a helper I will PM the Target and Sprint to you so you can make comments, question wording, extra decorations, revisions, etc. before the actual thing is released, and discuss/revise my answers.

I will provide a pdf copy as well as a Word 2007 attachment.

GOOD NEWS, I just finished both the Target and Sprint. I tried to make the exams look as realistic as possible, however the difficulty is much more balanced, therefore the last few problems are not significantly harder than the beginning ones like in normal MATHCOUNTS exams. The problems may be a bit difficult, but that's okay because the more difficult the better, right?

I took a couple of problems from AOPS books but most of them I just made up out of my own personal experience. It is possible that you will see a relation to MATHCOUNTS problems but that's probably just me rewriting whatever I have encountered.

Anyway this is just to say that the test may be out soon. Not in like the next day or two, because I still have to figure out the answers and stuff.
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andrew99
397 posts
#20 • 2 Y
Y by Adventure10, Mango247
luppleAOPS wrote:
Sure, anyone who wants to be a helper can. If you are a helper you cannot participate. If you are a helper I will PM the Target and Sprint to you so you can make comments, question wording, extra decorations, revisions, etc. before the actual thing is released, and discuss/revise my answers.

I will provide a pdf copy as well as a Word 2007 attachment.

GOOD NEWS, I just finished both the Target and Sprint. I tried to make the exams look as realistic as possible, however the difficulty is much more balanced, therefore the last few problems are not significantly harder than the beginning ones like in normal MATHCOUNTS exams. The problems may be a bit difficult, but that's okay because the more difficult the better, right?

I took a couple of problems from AOPS books but most of them I just made up out of my own personal experience. It is possible that you will see a relation to MATHCOUNTS problems but that's probably just me rewriting whatever I have encountered.

Anyway this is just to say that the test may be out soon. Not in like the next day or two, because I still have to figure out the answers and stuff.
Okay then I will be a helper!
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pi man
551 posts
#21 • 2 Y
Y by Adventure10, Mango247
I will join! :lol:
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luppleAOPS
70 posts
#22 • 2 Y
Y by Adventure10, Mango247
Its out!!!!!!!!!!!

Remember, I strongly urge you to use the normal time limits for Sprint and Target. Obviously, I can't force you to do that. But please do.

Like I said, difficulty will be around National, however problems may be more balanced than National as well.

Due date will be around April 2nd. If not enough tests are turned in by then, I will move the due date later.

Well anyway, have fun!

*of course, PM me your answers.
Attachments:
luppleSprint.pdf (267kb)
luppleTarget.pdf (223kb)
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mathiscool888
222 posts
#23 • 2 Y
Y by Adventure10, Mango247
Thank you for the test. It had really good problems and formatting.
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anonymous0
455 posts
#24 • 2 Y
Y by Adventure10, Mango247
Cool...how did you make it look like a real MATHCOUNTS test?
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luppleAOPS
70 posts
#25 • 1 Y
Y by Adventure10
Thanks!!! Most of it was Microsoft Word, then I used Clipart for pictures.

Also, if you are not signed up you can still PM me answers

I just realized that question 28 on sprint round is kinda stupid. Sorry. I was originally going to change that one out but I kinda forgot.

*However a (possibly?) useful formula is Click to reveal hidden text for sum of the first n triangular numbers. I'll give you that. (try to prove it? :D)
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luppleAOPS
70 posts
#26 • 2 Y
Y by Adventure10, Mango247
Answer Formatting Revisions for Target Round:

For #5, express your answer in the form a*10^b where a is a decimal rounded to the nearest tenth and b is an integer.

For #7, express your answer as a decimal to the nearest tenth.
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luppleAOPS
70 posts
#27 • 1 Y
Y by Adventure10
Revision: Due Date will be APRIL 11th, MONDAY. For every day you turn in early, I will add extra points to your score.

Turn your tests in!!!!!
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colinhy
751 posts
#28 • 2 Y
Y by Adventure10, Mango247
I'll join too.

Nice test!
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imtiyas1
22 posts
#29
Y by
Can anyone please check the answers I got for this mock :) ? Would greatly appreciate it.

Sprint

Target

In my opinion, the sprint test is an _____state sprint and the target round is an ____nationals target. Overall, the quality of the problems was incredible in both rounds :D
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N Quick Reply
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