Art of Problem Solving
AoPS Online AoPS Online
Math texts, online classes, and more
for students in grades 5-12.
Visit AoPS Online ‚
Books for Grades 5-12 Online Courses
Beast Academy Beast Academy
Engaging math books and online learning
for students ages 6-13.
Visit Beast Academy ‚
Books for Ages 6-13 Beast Academy Online
AoPS Academy AoPS Academy
Small live classes for advanced math
and language arts learners in grades 1-12.
Visit AoPS Academy ‚
Find a Physical Campus Visit the Virtual Campus

Stay ahead of learning milestones! Enroll in a class over the summer!
Contests & Programs AMC and other contests, summer programs, etc.
AMC and other contests, summer programs, etc.
3 M G
BBookmark  VNew Topic kLocked
Contests & Programs AMC and other contests, summer programs, etc.
AMC and other contests, summer programs, etc.
3 M G
BBookmark  VNew Topic kLocked
t 
34,712 topics
w
2 users
TOPICS
No tags match your search
M
AMC
AIME
AMC 10
geometry
USA(J)MO
AMC 12
USAMO
AIME I
AMC 10 A
USAJMO
AMC 8
poll
MATHCOUNTS
AMC 10 B
number theory
probability
summer program
trigonometry
algebra
AIME II
AMC 12 A
function
AMC 12 B
email
calculus
ARML
inequalities
analytic geometry
3D geometry
ratio
polynomial
AwesomeMath
search
AoPS Books
college
HMMT
USAMTS
Alcumus
quadratics
PROMYS
geometric transformation
Mathcamp
LaTeX
rectangle
logarithms
modular arithmetic
complex numbers
Ross Mathematics Program
contests
AMC10
No tags match your search
M
G
Topic
First Poster
Last Poster
H
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.

Introductory: Grades 5-10

Prealgebra 1 Self-Paced

Prealgebra 1
Tuesday, May 13 - Aug 26
Thursday, May 29 - Sep 11
Sunday, Jun 15 - Oct 12
Monday, Jun 30 - Oct 20
Wednesday, Jul 16 - Oct 29

Prealgebra 2 Self-Paced

Prealgebra 2
Wednesday, May 7 - Aug 20
Monday, Jun 2 - Sep 22
Sunday, Jun 29 - Oct 26
Friday, Jul 25 - Nov 21

Introduction to Algebra A Self-Paced

Introduction to Algebra A
Sunday, May 11 - Sep 14 (1:00 - 2:30 pm ET/10:00 - 11:30 am PT)
Wednesday, May 14 - Aug 27
Friday, May 30 - Sep 26
Monday, Jun 2 - Sep 22
Sunday, Jun 15 - Oct 12
Thursday, Jun 26 - Oct 9
Tuesday, Jul 15 - Oct 28

Introduction to Counting & Probability Self-Paced

Introduction to Counting & Probability
Thursday, May 15 - Jul 31
Sunday, Jun 1 - Aug 24
Thursday, Jun 12 - Aug 28
Wednesday, Jul 9 - Sep 24
Sunday, Jul 27 - Oct 19

Introduction to Number Theory
Friday, May 9 - Aug 1
Wednesday, May 21 - Aug 6
Monday, Jun 9 - Aug 25
Sunday, Jun 15 - Sep 14
Tuesday, Jul 15 - Sep 30

Introduction to Algebra B Self-Paced

Introduction to Algebra B
Tuesday, May 6 - Aug 19
Wednesday, Jun 4 - Sep 17
Sunday, Jun 22 - Oct 19
Friday, Jul 18 - Nov 14

Introduction to Geometry
Sunday, May 11 - Nov 9
Tuesday, May 20 - Oct 28
Monday, Jun 16 - Dec 8
Friday, Jun 20 - Jan 9
Sunday, Jun 29 - Jan 11
Monday, Jul 14 - Jan 19

Paradoxes and Infinity
Mon, Tue, Wed, & Thurs, Jul 14 - Jul 16 (meets every day of the week!)

Intermediate: Grades 8-12

Intermediate Algebra
Sunday, Jun 1 - Nov 23
Tuesday, Jun 10 - Nov 18
Wednesday, Jun 25 - Dec 10
Sunday, Jul 13 - Jan 18
Thursday, Jul 24 - Jan 22

Intermediate Counting & Probability
Wednesday, May 21 - Sep 17
Sunday, Jun 22 - Nov 2

Intermediate Number Theory
Sunday, Jun 1 - Aug 24
Wednesday, Jun 18 - Sep 3

Precalculus
Friday, May 16 - Oct 24
Sunday, Jun 1 - Nov 9
Monday, Jun 30 - Dec 8

Advanced: Grades 9-12

Olympiad Geometry
Tuesday, Jun 10 - Aug 26

Calculus
Tuesday, May 27 - Nov 11
Wednesday, Jun 25 - Dec 17

Group Theory
Thursday, Jun 12 - Sep 11

Contest Preparation: Grades 6-12

MATHCOUNTS/AMC 8 Basics
Friday, May 23 - Aug 15
Monday, Jun 2 - Aug 18
Thursday, Jun 12 - Aug 28
Sunday, Jun 22 - Sep 21
Tues & Thurs, Jul 8 - Aug 14 (meets twice a week!)

MATHCOUNTS/AMC 8 Advanced
Sunday, May 11 - Aug 10
Tuesday, May 27 - Aug 12
Wednesday, Jun 11 - Aug 27
Sunday, Jun 22 - Sep 21
Tues & Thurs, Jul 8 - Aug 14 (meets twice a week!)

AMC 10 Problem Series
Friday, May 9 - Aug 1
Sunday, Jun 1 - Aug 24
Thursday, Jun 12 - Aug 28
Tuesday, Jun 17 - Sep 2
Sunday, Jun 22 - Sep 21 (1:00 - 2:30 pm ET/10:00 - 11:30 am PT)
Monday, Jun 23 - Sep 15
Tues & Thurs, Jul 8 - Aug 14 (meets twice a week!)

AMC 10 Final Fives
Sunday, May 11 - Jun 8
Tuesday, May 27 - Jun 17
Monday, Jun 30 - Jul 21

AMC 12 Problem Series
Tuesday, May 27 - Aug 12
Thursday, Jun 12 - Aug 28
Sunday, Jun 22 - Sep 21
Wednesday, Aug 6 - Oct 22

AMC 12 Final Fives
Sunday, May 18 - Jun 15

AIME Problem Series A
Thursday, May 22 - Jul 31

AIME Problem Series B
Sunday, Jun 22 - Sep 21

F=ma Problem Series
Wednesday, Jun 11 - Aug 27

WOOT Programs
Visit the pages linked for full schedule details for each of these programs!

MathWOOT Level 1
MathWOOT Level 2
ChemWOOT
CodeWOOT
PhysicsWOOT

Programming

Introduction to Programming with Python
Thursday, May 22 - Aug 7
Sunday, Jun 15 - Sep 14 (1:00 - 2:30 pm ET/10:00 - 11:30 am PT)
Tuesday, Jun 17 - Sep 2
Monday, Jun 30 - Sep 22

Intermediate Programming with Python
Sunday, Jun 1 - Aug 24
Monday, Jun 30 - Sep 22

USACO Bronze Problem Series
Tuesday, May 13 - Jul 29
Sunday, Jun 22 - Sep 1

Physics

Introduction to Physics
Wednesday, May 21 - Aug 6
Sunday, Jun 15 - Sep 14
Monday, Jun 23 - Sep 15

Physics 1: Mechanics
Thursday, May 22 - Oct 30
Monday, Jun 23 - Dec 15

Relativity
Mon, Tue, Wed & Thurs, Jun 23 - Jun 26 (meets every day of the week!)
0 replies
jlacosta
May 1, 2025
0 replies
J
H
[CASH PRIZES] IndyINTEGIRLS Spring Math Competition
Indy_Integirls   2
N an hour ago by ChaitraliKA
[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: Follow us on Instagram @indy.integirls, join our Discord, follow us on TikTok @indy.integirls, and 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!
2 replies
Indy_Integirls
May 11, 2025
ChaitraliKA
an hour ago
J
H
General Number Theory
ckorr2018   0
an hour ago
Let u and v be rational numbers for which u^3-3u^2v+v^3 and 3uv(v-u) are both integers. Prove that uv(v-u) is also an integer.
0 replies
ckorr2018
an hour ago
0 replies
J
H
Suggestions for preparing for AMC 12
peppermint_cat   3
N 4 hours ago by Konigsberg
So, I have decided to attempt taking the AMC 12 this fall. I don't have any experience with math competitions, and I thought that here might be a good place to see if anyone who has taken the AMC 12 (or done any other math competitions) has any suggestions on what to expect, how to prepare, etc. Thank you!
3 replies
peppermint_cat
Today at 1:04 AM
Konigsberg
4 hours ago
J
H
Harmonic Mean
Happytycho   4
N Today at 4:42 AM by elizhang101412
Source: Problem #2 2016 AMC 12B
The harmonic mean of two numbers can be calculated as twice their product divided by their sum. The harmonic mean of $1$ and $2016$ is closest to which integer?

$\textbf{(A)}\ 2 \qquad \textbf{(B)}\ 45 \qquad \textbf{(C)}\ 504 \qquad \textbf{(D)}\ 1008 \qquad \textbf{(E)}\ 2015 $
4 replies
Happytycho
Feb 21, 2016
elizhang101412
Today at 4:42 AM
J
No more topics!
H
J
H
k RIP BS2012
gavinhaominwang   22
N Apr 23, 2025 by torch
Rip BS2012, I hope you come back next year stronger and prove everyone wrong.
22 replies
gavinhaominwang
Apr 23, 2025
torch
Apr 23, 2025
J
RIP BS2012
G H J
Reveal topic tags
L
G H BBookmark kLocked kLocked NReply
The post below has been deleted. Click to close.
This post has been deleted. Click here to see post.
gavinhaominwang
92 posts
gavinhaominwang
#1 h  Apr 23, 2025, 12:32 AM • 4 Y
Y by PikaPika999, bwu_2022, scannose, bjump
Rip BS2012, I hope you come back next year stronger and prove everyone wrong.
Z Y
The post below has been deleted. Click to close.
This post has been deleted. Click here to see post.
maxamc
579 posts
maxamc
#2 h  Apr 23, 2025, 12:33 AM • 1 Y
Y by PikaPika999
Also rip hashbrown2009
Z Y
The post below has been deleted. Click to close.
This post has been deleted. Click here to see post.
Andyluo
977 posts
Andyluo
#3 h  Apr 23, 2025, 2:43 AM • 4 Y
Y by Mathandski, bjump, megarnie, KevinYang2.71
RIP Bjump, you got this next year tho fr
Z Y
The post below has been deleted. Click to close.
This post has been deleted. Click here to see post.
mathkiddus
240 posts
mathkiddus
#4 h  Apr 23, 2025, 2:55 AM • 2 Y
Y by mathfan2020, bjump
also RIP dogeA,
Z Y
The post below has been deleted. Click to close.
This post has been deleted. Click here to see post.
vincentwant
1423 posts
vincentwant
#5 h  Apr 23, 2025, 3:36 AM • 3 Y
Y by mathfan2020, Ilikeminecraft, bjump
RIP a_smart_alecks
Z Y
The post below has been deleted. Click to close.
This post has been deleted. Click here to see post.
ThoughtfulGorilla10
27 posts
ThoughtfulGorilla10
#6 h  Apr 23, 2025, 3:40 AM
Y by
What do i do here
Z Y
The post below has been deleted. Click to close.
This post has been deleted. Click here to see post.
mathfan2020
351 posts
mathfan2020
#7 h  Apr 23, 2025, 3:56 AM • 1 Y
Y by bjump
RIP PenguinMoosey
Z Y
The post below has been deleted. Click to close.
This post has been deleted. Click here to see post.
PEKKA
1848 posts
PEKKA
#8 h  Apr 23, 2025, 4:23 AM • 1 Y
Y by bjump
RIP llmmddtt1
Z Y
The post below has been deleted. Click to close.
This post has been deleted. Click here to see post.
zhoujef000
319 posts
zhoujef000
#9 h  Apr 23, 2025, 4:26 AM • 4 Y
Y by bjump, megarnie, mathfan2020, KnowingAnt
RIP KnowingAnt
Z Y
The post below has been deleted. Click to close.
This post has been deleted. Click here to see post.
Alpaca31415
12 posts
Alpaca31415
#10 h  Apr 23, 2025, 4:41 AM • 1 Y
Y by bjump
rip me fr I suck
Z Y
The post below has been deleted. Click to close.
This post has been deleted. Click here to see post.
Ilikeminecraft
653 posts
Ilikeminecraft
#11 h  Apr 23, 2025, 4:55 AM • 2 Y
Y by bjump, mathfan2020
rip impromptuA
Z Y
The post below has been deleted. Click to close.
This post has been deleted. Click here to see post.
deduck
238 posts
deduck
#12 h  Apr 23, 2025, 5:24 AM • 4 Y
Y by bjump, bachkieu, mathfan2020, ninjaforce
rip math4life2020
Z Y
The post below has been deleted. Click to close.
This post has been deleted. Click here to see post.
KevinYang2.71
427 posts
KevinYang2.71
#13 h  Apr 23, 2025, 6:40 AM • 4 Y
Y by Mathandski, bjump, megarnie, deduck
rip deduck
Z Y
The post below has been deleted. Click to close.
This post has been deleted. Click here to see post.
MathRook7817
742 posts
MathRook7817
#14 h  Apr 23, 2025, 2:16 PM
Y by
RIP MathRook7817
Z Y
The post below has been deleted. Click to close.
This post has been deleted. Click here to see post.
NoSignOfTheta
1744 posts
NoSignOfTheta
#15 h  Apr 23, 2025, 2:23 PM
Y by
RIP aopsonline2020888
Z Y
The post below has been deleted. Click to close.
This post has been deleted. Click here to see post.
ethan2011
324 posts
ethan2011
#16 h  Apr 23, 2025, 2:28 PM • 1 Y
Y by mathfan2020
RIP mathfan2020
Z Y
The post below has been deleted. Click to close.
This post has been deleted. Click here to see post.
TiguhBabeHwo
485 posts
TiguhBabeHwo
#17 h  Apr 23, 2025, 2:50 PM • 1 Y
Y by mathfan2020
RIP ethan2011
Z Y
The post below has been deleted. Click to close.
This post has been deleted. Click here to see post.
MathPerson12321
3786 posts
MathPerson12321
#18 h  Apr 23, 2025, 2:53 PM
Y by
rip everyone but we dont need a separate thread for this
/req lock

you all will make it next yr!
Z Y
The post below has been deleted. Click to close.
This post has been deleted. Click here to see post.
bachkieu
137 posts
bachkieu
#19 h  Apr 23, 2025, 3:01 PM
Y by
rip tiguhbabehwo 232
Z Y
The post below has been deleted. Click to close.
This post has been deleted. Click here to see post.
Mathdreams
1472 posts
Mathdreams
#20 h  Apr 23, 2025, 3:13 PM • 1 Y
Y by bjump
RIP bjump :(
Z Y
The post below has been deleted. Click to close.
This post has been deleted. Click here to see post.
dragoon
1947 posts
dragoon
#21 h  Apr 23, 2025, 3:14 PM • 1 Y
Y by bjump
rip bjump :( :(
Z Y
The post below has been deleted. Click to close.
This post has been deleted. Click here to see post.
MathRook7817
742 posts
MathRook7817
#22 h  Apr 23, 2025, 3:22 PM
Y by
RIP everyone who didnt make JMO (me)
Z Y
The post below has been deleted. Click to close.
This post has been deleted. Click here to see post.
torch
1015 posts
torch
#23 h  Apr 23, 2025, 3:23 PM • 2 Y
Y by bjump, KevinYang2.71
rip bjump :(
Z Y
G
H
=
a