Y by Exponent11, Tem8
https://maa.edvistas.com/eduview/report.aspx?view=1561&mode=6
who were the 2 usamo perfects
who were the 2 usamo perfects
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This post has been edited 1 time. Last edited by BS2012, Apr 23, 2025, 10:08 PM
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k a May Highlights and 2025 AoPS Online Class Information
jlacosta 0
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.
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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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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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Prealgebra 1 Self-Paced
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0 replies
k i Adding contests to the Contest Collections
dcouchman 1
N
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
Find instructions and a list of contests to add here: https://artofproblemsolving.com/community/c40244h1064480_contests_to_add
1 reply
k i Zero tolerance
ZetaX 49
N
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]
[/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
, do not answer with "
is a solution" only. Either you post any kind of proof or at least something unexpected (like "
is the smallest solution). Someone that does not see that 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.
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]
[/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
, do not answer with "
is a solution" only. Either you post any kind of proof or at least something unexpected (like "
is the smallest solution). Someone that does not see that 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
Goals for 2025-2026
Airbus320-214 2
N
by AshAuktober
Please write down your goal/goals for competitions here for 2025-2026.
2 replies
MOP Emails Out! (not clickbait)
Mathandski 104
N
by ohiorizzler1434
What an emotional roller coaster the past 34 days have been.
Congrats to all that qualified!
Congrats to all that qualified!
104 replies
Combi Geo
Adywastaken 2
N
by lakshya2009
Source: NMTC 2024/8
A regular polygon with 
vertices is given. To each vertex, a natural number from the set 
is assigned. Prove that there are 
vertices 
such that if the numbers 
are assigned to them respectively, then 
and 
is a parallelogram.
vertices is given. To each vertex, a natural number from the set 
is assigned. Prove that there are 
vertices 
such that if the numbers 
are assigned to them respectively, then 
and 
is a parallelogram.
2 replies
Brilliant guessing game on triples
Assassino9931 1
N
by Sardor_lil
Source: Al-Khwarizmi Junior International Olympiad 2025 P8
There are cards on a table, flipped face down. Madina knows that on each card a single number is written and that the numbers are different integers from 
to . In a move, Madina is allowed to choose any 
cards, and she is told a number that is written on one of the chosen cards, but not which specific card it is on. After several moves, Madina must determine the written numbers on as many cards as possible. What is the maximum number of cards Madina can ensure to determine?
Shubin Yakov, Russia
cards on a table, flipped face down. Madina knows that on each card a single number is written and that the numbers are different integers from 
to . In a move, Madina is allowed to choose any 
cards, and she is told a number that is written on one of the chosen cards, but not which specific card it is on. After several moves, Madina must determine the written numbers on as many cards as possible. What is the maximum number of cards Madina can ensure to determine?Shubin Yakov, Russia
1 reply
in n^2-9 has 6 positive divisors than GCD (n-3, n+3)=1
parmenides51 7
N
by AylyGayypow009
Source: Greece JBMO TST 2016 p3
Positive integer 
is such that number 
has exactly 
positive divisors. Prove that GCD 
is such that number 
has exactly 
positive divisors. Prove that GCD 
7 replies
The familiar right angle from the orthocenter
buratinogigle 2
N
by jainam_luniya
Source: Own, HSGSO P6
Let 
be a triangle inscribed in a circle 
with orthocenter 
and altitude 
. Let 
be the midpoint of 
. Line 
meets again at 
. Line 
meets again at 
. Let 
be the orthogonal projection of 
on the line 
. Line 
meets again at 
. Prove that 
.
be a triangle inscribed in a circle 
with orthocenter 
and altitude 
. Let 
be the midpoint of 
. Line 
meets again at 
. Line 
meets again at 
. Let 
be the orthogonal projection of 
on the line 
. Line 
meets again at 
. Prove that 
.
2 replies
a deep thinking topic. either useless or extraordinary , not yet disovered
jainam_luniya 5
N
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
Divisibilty...
Sadigly 4
N
by jainam_luniya
Source: Azerbaijan Junior NMO 2025 P2
Find all consecutive even numbers, such that the sum of their squares divides the square of their product.
consecutive even numbers, such that the sum of their squares divides the square of their product.
4 replies
1 viewing
ioqm to imo journey
jainam_luniya 2
N
by jainam_luniya
only imginative ones are alloud .all country and classes or even colleges
2 replies
Inequality
Sadigly 5
N
by jainam_luniya
Source: Azerbaijan Junior MO 2025 P5
For positive real numbers 
satisfying 
, find the biggest value the following equation could acquire:
satisfying 
, find the biggest value the following equation could acquire:
5 replies
D'B, E'C and l are congruence.
cronus119 7
N
by Tkn
Source: 2022 Iran second round mathematical Olympiad P1
Let and 
on 
and 
respectively in 
such that 
then draw line 
through 
such that 
let 
and 
reflection of 
and to respectively prove that 
and are congruence.
and 
on 
and 
respectively in 
such that 
then draw line 
through 
such that 
let 
and 
reflection of 
and to respectively prove that 
and are congruence.
7 replies
a set of $9$ distinct integers
N.T.TUAN 17
N
by hlminh
Source: APMO 2007
Let 
be a set of 
distinct integers all of whose prime factors are at most 
Prove that contains distinct integers such that their product is a perfect cube.
be a set of 
distinct integers all of whose prime factors are at most 
Prove that contains distinct integers such that their product is a perfect cube.
17 replies
Past USAMO Medals
sdpandit 2
N
by sdpandit
Does anyone know where to find lists of USAMO medalists from past years? I can find the 2025 list on their website, but they don't seem to keep lists from previous years and I can't find it anywhere else. Thanks!
2 replies
Geo is back??
GoodMorning 137
N
by Siddharthmaybe
Source: 2023 USAJMO Problem 2/USAMO Problem 1
In an acute triangle , let be the midpoint of 
. Let be the foot of the perpendicular from 
to 
. Suppose that the circumcircle of triangle 
intersects line at two distinct points 
and . Let 
be the midpoint of 
. Prove that 
.
Proposed by Holden Mui
, let be the midpoint of 
. Let be the foot of the perpendicular from 
to 
. Suppose that the circumcircle of triangle 
intersects line at two distinct points 
and . Let 
be the midpoint of 
. Prove that 
.Proposed by Holden Mui
137 replies
USA(J)MO Statistics Out
G
H
G
H
Source: MAA edvistas page
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Y by
looks like the whole "usamts doesn't affect cutoffs" was a whole bunch of bs. at least according to evan chen's statistics of 2024, there were only four more oly participants than last year, despite the +50 increase from usamts. (you get the idea, these numbers apparently aren't very precise)
please don’t take this the wrong way. I support the usamts pathway, if it's reworked a bit; I’m just saying that usamts (most likely) did affect cutoffs.
please don’t take this the wrong way. I support the usamts pathway, if it's reworked a bit; I’m just saying that usamts (most likely) did affect cutoffs.
This post has been edited 3 times. Last edited by rhydon516, Apr 25, 2025, 12:11 AM
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Y by Exponent11, bachkieu
BS2012 wrote:
who were the 2 usamo perfects
Math4Life2020
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Y
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#8
Apr 23, 2025, 11:02 PM
Y by
rhydon516 wrote:
looks like the whole "usamts doesn't affect cutoffs" was a whole bunch of bs. at least according to evan chen's statistics of 2024, there were only four more oly participants than last year, despite the +50 increase from usamts. (you get the idea, these numbers apparently aren't very precise)
yeah, that explains why the cutoffs were so high this year
Z
K
Y
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#9
Apr 23, 2025, 11:05 PM
Y by
rhydon516 wrote:
looks like the whole "usamts doesn't affect cutoffs" was a whole bunch of bs. at least according to evan chen's statistics of 2024, there were only four more oly participants than last year, despite the +50 increase from usamts. (you get the idea, these numbers apparently aren't very precise)
where’s the +50 increase coming from? as far as I know there was less than 10 people that qualified through usamts but not amc.
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Y by xTimmyG, elasticwealth, llddmmtt1, MathPerson12321, Arcticturn
womp womp
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rhydon516 wrote:
looks like the whole "usamts doesn't affect cutoffs" was a whole bunch of bs. at least according to evan chen's statistics of 2024, there were only four more oly participants than last year, despite the +50 increase from usamts. (you get the idea, these numbers apparently aren't very precise)
yup exactly!!!
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#15
Apr 24, 2025, 12:09 AM
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llddmmtt1 wrote:
no you are not
where’s your data bro :sob: you telling me you know 50 people that made usamo through usamts but not amc
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Y by aopscalculator
jellybeanzzz wrote:
llddmmtt1 wrote:
no you are not
where’s your data bro :sob: you telling me you know 50 people that made usamo through usamts but not amc
i am falsifying your claim that at most 10 people made through usamts and not amc
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#17
Apr 24, 2025, 12:10 AM
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llddmmtt1 wrote:
i am falsifying your claim that at most 10 people made through usamts and not amc
so where’s your data/proof?
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