Plan ahead for the next school year. Schedule your class today!

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
G
Topic
First Poster
Last Poster
k a July Highlights and 2025 AoPS Online Class Information
jwelsh   0
Jul 1, 2025
We are halfway through summer, so be sure to carve out some time to keep your skills sharp and explore challenging topics at AoPS Online and our AoPS Academies (including the Virtual Campus)!

[list][*]Over 60 summer classes are starting at the Virtual Campus on July 7th - check out the math and language arts options for middle through high school levels.
[*]At AoPS Online, we have accelerated sections where you can complete a course in half the time by meeting twice/week instead of once/week, starting on July 8th:
[list][*]MATHCOUNTS/AMC 8 Basics
[*]MATHCOUNTS/AMC 8 Advanced
[*]AMC Problem Series[/list]
[*]Plus, AoPS Online has a special seminar July 14 - 17 that is outside the standard fare: Paradoxes and Infinity
[*]We are expanding our in-person AoPS Academy locations - are you looking for a strong community of problem solvers, exemplary instruction, and math and language arts options? Look to see if we have a location near you and enroll in summer camps or academic year classes today! New locations include campuses in California, Georgia, New York, Illinois, and Oregon and more coming soon![/list]

MOP (Math Olympiad Summer Program) just ended and the IMO (International Mathematical Olympiad) is right around the corner! This year’s IMO will be held in Australia, July 10th - 20th. Congratulations to all the MOP students for reaching this incredible level and best of luck to all selected to represent their countries at this year’s IMO! Did you know that, in the last 10 years, 59 USA International Math Olympiad team members have medaled and have taken over 360 AoPS Online courses. Take advantage of our Worldwide Online Olympiad Training (WOOT) courses
and train with the best! Please note that early bird pricing ends August 19th!
Are you tired of the heat and thinking about Fall? You can plan your Fall schedule now with classes at either AoPS Online, AoPS Academy Virtual Campus, or one of our AoPS Academies around the US.

Our full course list for upcoming classes is below:
All classes start 7:30pm ET/4:30pm PT unless otherwise noted.

Introductory: Grades 5-10

Prealgebra 1 Self-Paced

Prealgebra 1
Wednesday, Jul 16 - Oct 29
Sunday, Aug 17 - Dec 14
Tuesday, Aug 26 - Dec 16
Friday, Sep 5 - Jan 16
Monday, Sep 8 - Jan 12
Tuesday, Sep 16 - Jan 20 (4:30 - 5:45 pm ET/1:30 - 2:45 pm PT)
Sunday, Sep 21 - Jan 25
Thursday, Sep 25 - Jan 29
Wednesday, Oct 22 - Feb 25
Tuesday, Nov 4 - Mar 10
Friday, Dec 12 - Apr 10

Prealgebra 2 Self-Paced

Prealgebra 2
Friday, Jul 25 - Nov 21
Sunday, Aug 17 - Dec 14
Tuesday, Sep 9 - Jan 13
Thursday, Sep 25 - Jan 29
Sunday, Oct 19 - Feb 22
Monday, Oct 27 - Mar 2
Wednesday, Nov 12 - Mar 18

Introduction to Algebra A Self-Paced

Introduction to Algebra A
Tuesday, Jul 15 - Oct 28
Sunday, Aug 17 - Dec 14
Wednesday, Aug 27 - Dec 17
Friday, Sep 5 - Jan 16
Thursday, Sep 11 - Jan 15
Sunday, Sep 28 - Feb 1
Monday, Oct 6 - Feb 9
Tuesday, Oct 21 - Feb 24
Sunday, Nov 9 - Mar 15
Friday, Dec 5 - Apr 3

Introduction to Counting & Probability Self-Paced

Introduction to Counting & Probability
Wednesday, Jul 2 - Sep 17
Sunday, Jul 27 - Oct 19
Monday, Aug 11 - Nov 3
Wednesday, Sep 3 - Nov 19
Sunday, Sep 21 - Dec 14 (1:00 - 2:30 pm ET/10:00 - 11:30 am PT)
Friday, Oct 3 - Jan 16
Sunday, Oct 19 - Jan 25
Tuesday, Nov 4 - Feb 10
Sunday, Dec 7 - Mar 8

Introduction to Number Theory
Tuesday, Jul 15 - Sep 30
Wednesday, Aug 13 - Oct 29
Friday, Sep 12 - Dec 12
Sunday, Oct 26 - Feb 1
Monday, Dec 1 - Mar 2

Introduction to Algebra B Self-Paced

Introduction to Algebra B
Friday, Jul 18 - Nov 14
Thursday, Aug 7 - Nov 20
Monday, Aug 18 - Dec 15
Sunday, Sep 7 - Jan 11
Thursday, Sep 11 - Jan 15
Wednesday, Sep 24 - Jan 28
Sunday, Oct 26 - Mar 1
Tuesday, Nov 4 - Mar 10
Monday, Dec 1 - Mar 30

Introduction to Geometry
Monday, Jul 14 - Jan 19
Wednesday, Aug 13 - Feb 11
Tuesday, Aug 26 - Feb 24
Sunday, Sep 7 - Mar 8
Thursday, Sep 11 - Mar 12
Wednesday, Sep 24 - Mar 25
Sunday, Oct 26 - Apr 26
Monday, Nov 3 - May 4
Friday, Dec 5 - May 29

Paradoxes and Infinity
Mon, Tue, Wed, & Thurs, Jul 14 - Jul 16 (meets every day of the week!)
Sat & Sun, Sep 13 - Sep 14 (1:00 - 4:00 PM PT/4:00 - 7:00 PM ET)

Intermediate: Grades 8-12

Intermediate Algebra
Sunday, Jul 13 - Jan 18
Thursday, Jul 24 - Jan 22
Friday, Aug 8 - Feb 20
Tuesday, Aug 26 - Feb 24
Sunday, Sep 28 - Mar 29
Wednesday, Oct 8 - Mar 8
Sunday, Nov 16 - May 17
Thursday, Dec 11 - Jun 4

Intermediate Counting & Probability
Sunday, Sep 28 - Feb 15
Tuesday, Nov 4 - Mar 24

Intermediate Number Theory
Wednesday, Sep 24 - Dec 17

Precalculus
Wednesday, Aug 6 - Jan 21
Tuesday, Sep 9 - Feb 24
Sunday, Sep 21 - Mar 8
Monday, Oct 20 - Apr 6
Sunday, Dec 14 - May 31

Advanced: Grades 9-12

Calculus
Sunday, Sep 7 - Mar 15
Wednesday, Sep 24 - Apr 1
Friday, Nov 14 - May 22

Contest Preparation: Grades 6-12

MATHCOUNTS/AMC 8 Basics
Tues & Thurs, Jul 8 - Aug 14 (meets twice a week!)
Sunday, Aug 17 - Nov 9
Wednesday, Sep 3 - Nov 19
Tuesday, Sep 16 - Dec 9
Sunday, Sep 21 - Dec 14 (1:00 - 2:30 pm ET/10:00 - 11:30 am PT)
Monday, Oct 6 - Jan 12
Thursday, Oct 16 - Jan 22
Tues, Thurs & Sun, Dec 9 - Jan 18 (meets three times a week!)

MATHCOUNTS/AMC 8 Advanced
Tues & Thurs, Jul 8 - Aug 14 (meets twice a week!)
Sunday, Aug 17 - Nov 9
Tuesday, Aug 26 - Nov 11
Thursday, Sep 4 - Nov 20
Friday, Sep 12 - Dec 12
Monday, Sep 15 - Dec 8
Sunday, Oct 5 - Jan 11
Tues, Thurs & Sun, Dec 2 - Jan 11 (meets three times a week!)
Mon, Wed & Fri, Dec 8 - Jan 16 (meets three times a week!)

AMC 10 Problem Series
Tues & Thurs, Jul 8 - Aug 14 (meets twice a week!)
Sunday, Aug 10 - Nov 2
Thursday, Aug 14 - Oct 30
Tuesday, Aug 19 - Nov 4
Mon & Wed, Sep 15 - Oct 22 (meets twice a week!)
Mon, Wed & Fri, Oct 6 - Nov 3 (meets three times a week!)
Tue, Thurs & Sun, Oct 7 - Nov 2 (meets three times a week!)

AMC 10 Final Fives
Friday, Aug 15 - Sep 12
Sunday, Sep 7 - Sep 28
Tuesday, Sep 9 - Sep 30
Monday, Sep 22 - Oct 13
Sunday, Sep 28 - Oct 19 (1:00 - 2:30 pm ET/10:00 - 11:30 am PT)
Wednesday, Oct 8 - Oct 29
Thursday, Oct 9 - Oct 30

AMC 12 Problem Series
Wednesday, Aug 6 - Oct 22
Sunday, Aug 10 - Nov 2
Monday, Aug 18 - Nov 10
Mon & Wed, Sep 15 - Oct 22 (meets twice a week!)
Tues, Thurs & Sun, Oct 7 - Nov 2 (meets three times a week!)

AMC 12 Final Fives
Thursday, Sep 4 - Sep 25
Sunday, Sep 28 - Oct 19
Tuesday, Oct 7 - Oct 28

AIME Problem Series A
Thursday, Oct 23 - Jan 29

AIME Problem Series B
Tuesday, Sep 2 - Nov 18

F=ma Problem Series
Tuesday, Sep 16 - Dec 9
Friday, Oct 17 - Jan 30

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, Aug 14 - Oct 30
Sunday, Sep 7 - Nov 23
Tuesday, Dec 2 - Mar 3

Intermediate Programming with Python
Friday, Oct 3 - Jan 16

USACO Bronze Problem Series
Wednesday, Sep 3 - Dec 3
Thursday, Oct 30 - Feb 5
Tuesday, Dec 2 - Mar 3

Physics

Introduction to Physics
Tuesday, Sep 2 - Nov 18
Sunday, Oct 5 - Jan 11
Wednesday, Dec 10 - Mar 11

Physics 1: Mechanics
Sunday, Sep 21 - Mar 22
Sunday, Oct 26 - Apr 26
0 replies
jwelsh
Jul 1, 2025
0 replies
OpenAI won gold on 2025 IMO
centslordm   126
N 44 minutes ago by Yiyj
it got 35/42
3 years ago it got 2; aura imo

[its solutions]
126 replies
centslordm
Jul 20, 2025
Yiyj
44 minutes ago
Does anyone have access to the current AMM edition? I’d like to check out the pr
Khalifakhalifa   1
N 3 hours ago by Khalifakhalifa
Does anyone have access to the current AMM edition? I’d like to check out the problems section.
1 reply
Khalifakhalifa
Yesterday at 11:15 AM
Khalifakhalifa
3 hours ago
Improving timing on AMC 10
AdrienMarieLegendre   20
N 4 hours ago by ahxun2006
hello,
I'm currently preparing for the AMC 10, but I'm struggling with time. When doing past tests, I can only answer 10-12 questions in the 75-minute time frame. I can solve the rest of the questions, but they take me fairly long to complete (15-30 mins depending on the question). Do you guys have any tips/strategies on improving timing? Would it be best just to solve more problems?
20 replies
AdrienMarieLegendre
Jul 16, 2025
ahxun2006
4 hours ago
Finite Series and Sequences - AP, GP, Special Finite series and Telescoping seri
wimpykid   5
N 4 hours ago by mudkip42
Let a natural number, $n = 2^{p - 1}(2^p - 1)$, where $2^p - 1$ is a prime. Show that the sum of all positive divisors of $n$ is equal to $2n$.
5 replies
wimpykid
Yesterday at 1:28 PM
mudkip42
4 hours ago
Stressed spelled backwards
centslordm   27
N 4 hours ago by W33
Source: AIME 2025 #3
The 9 members of a baseball team went to an ice-cream parlor after their game. Each player had a singlescoop cone of chocolate, vanilla, or strawberry ice cream. At least one player chose each flavor, and the number of players who chose chocolate was greater than the number of players who chose vanilla, which was greater than the number of players who chose strawberry. Let $N$ be the number of different assignments of flavors to players that meet these conditions. Find the remainder when $N$ is divided by $1000.$
27 replies
centslordm
Feb 7, 2025
W33
4 hours ago
[PMO25 Area Stage I.1] Parallelogram Area
Konigsberg   1
N 5 hours ago by Siopao_Enjoyer
In parallelogram \( WXYZ \), the length of diagonal \( WY \) is 15, and the perpendicular distances from \( W \) to lines \( YZ \) and \( XY \) are 9 and 12, respectively. Find the least possible area of the parallelogram.

Answer Confirmation
1 reply
Konigsberg
Feb 15, 2025
Siopao_Enjoyer
5 hours ago
cool problem.
ChickensEatGrass   2
N 5 hours ago by SpeedCuber7
if $x + y+z = 0$, prove
$ax^2 + by^2+cz^2+xyz=4abc$.
2 replies
ChickensEatGrass
Yesterday at 7:11 PM
SpeedCuber7
5 hours ago
Inequalities
sqing   19
N Today at 1:23 AM by sqing
Let $ a,b,c\geq 0  . $ Prove that
$$ \sqrt{ a^3+b^3+c^3+\frac{1}{4}} +  \frac{9}{5}abc+\frac{1}{2} \geq a+b+c$$O706
19 replies
sqing
Jul 19, 2025
sqing
Today at 1:23 AM
Complex numbers
preatsreard   3
N Yesterday at 10:26 PM by preatsreard
How many complex z exist, such that z,z²,z³,....,z²⁰²¹ form a perfect 2021-gon (in arbitary order) in a complex plane.
3 replies
preatsreard
Jul 20, 2025
preatsreard
Yesterday at 10:26 PM
Ez geo with 2 circiles and parallel lines
Tofa7a._.36   2
N Yesterday at 9:26 PM by Merlinaeus
Let $ABC$ be an acute triangle with circumcircle $\omega$. Let $D$ be the intersection of $\omega$ with the angle bisector of $\angle BAC$. Let $E$ be on $[DC)$ and assume that the circumcircle of the triangle $ACE$ meets $[BC]$ at $F$. Let $(DF)$ meet $\omega$ and $(ACF)$ at $G$ and $H$, respectively.
Prove that $(GC) \parallel (HE)$ .
2 replies
Tofa7a._.36
Jul 15, 2025
Merlinaeus
Yesterday at 9:26 PM
inequalities about absolute value
nhathhuyyp5c   1
N Yesterday at 8:26 PM by alexheinis
Consider nonzero real numbers \( a, b, c \) such that \( a + b + c = 0 \). Find the minimum value of the expression
\[
P = \left| \frac{a^2}{b^2 + c^2 - a^2} \right| + \left| \frac{b^2}{c^2 + a^2 - b^2} \right| + \left| \frac{c^2}{a^2 + b^2 - c^2} \right|.
\]
1 reply
nhathhuyyp5c
Yesterday at 3:43 PM
alexheinis
Yesterday at 8:26 PM
120 degrees arc
xeroxia   3
N Yesterday at 7:49 PM by xeroxia
Let $\Pi$ be a circle with center $O$, and $A,B$ be points on $\Pi$ such that $\angle AOB = 120^\circ$. Let $M$ be the midpoint of minor $\overarc {AB}$. Let $C$ be a point on segment $OA$ such that $AC = 5$ and $CO = 3$. Let the circumcircle of $\triangle OCM$ meet $\Pi$ at $N$ and $OB$ at $D$. Let $ND$ meet $\Pi$ at $E$.
$NE = \dfrac ab$, where $a,b$ are relatively prime positive integers. Find $a+b$.
3 replies
xeroxia
Yesterday at 5:35 AM
xeroxia
Yesterday at 7:49 PM
PRMO 2019 #26
molikpagaria   1
N Yesterday at 4:33 PM by nudinhtien
Positive integers x, y, z satisfy xy + z = 160. Compute the smallest possible value of x + yz.

I have seen many people doing this by hit and trial, but how do you solve it using an actual way?
1 reply
molikpagaria
Yesterday at 4:26 PM
nudinhtien
Yesterday at 4:33 PM
Mathematics
MathophobiticLad   0
Yesterday at 4:12 PM
Evaluate: $$\sum \sum_{0<r<s<n} \lfloor \frac{LCM(^nC_r , ^nC_s)}{^nC_r , ^nC_s} \rfloor $$Where $\lfloor . \rfloor$ represents Greatest integer function.
0 replies
MathophobiticLad
Yesterday at 4:12 PM
0 replies
introductory olympiad problems
Soupboy0   1
N Jul 4, 2025 by babyzombievillager
does anybody know any competitons with introductory olympiad questions
1 reply
Soupboy0
Jul 4, 2025
babyzombievillager
Jul 4, 2025
introductory olympiad problems
G H J
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.
Soupboy0
633 posts
#1
Y by
does anybody know any competitons with introductory olympiad questions
Z K Y
The post below has been deleted. Click to close.
This post has been deleted. Click here to see post.
babyzombievillager
413 posts
#2 • 1 Y
Y by lpieleanu
USAMTS, JBMO, USAJMO are some good ones.

Additionally, you can use Evan Chen's MOHS scale to find introductory (0 - 10 MOHS) olympiad questions... that being said, make sure you try hard problems too, and don't let the MOHS scale "limit" what type of olympiad questions you try (i.e., don't say "I give up on this problem b/c it's 25 MOHS" or something). Hope this helps!
This post has been edited 1 time. Last edited by babyzombievillager, Jul 4, 2025, 4:51 AM
Z K Y
N Quick Reply
G
H
=
a