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Contests & Programs AMC and other contests, summer programs, etc.
AMC and other contests, summer programs, etc.
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Contests & Programs AMC and other contests, summer programs, etc.
AMC and other contests, summer programs, etc.
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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]
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
Mar 2, 2025
0 replies
mohs of each oly
cowstalker   10
N 9 minutes ago by vincentwant
what are the general concencus for the mohs of each of the problems on usajmo and usamo
10 replies
cowstalker
Today at 1:20 AM
vincentwant
9 minutes ago
2021 AMC10A Problem 1
Professor-Mom   54
N an hour ago by Pengu14
What is the value of $$(2^2-2) - (3^2-3) + (4^2-4)?$$
$\textbf{(A) } 1 \qquad \textbf{(B) } 2 \qquad \textbf{(C) } 5 \qquad \textbf{(D) } 8 \qquad \textbf{(E) } 12$
54 replies
Professor-Mom
Feb 5, 2021
Pengu14
an hour ago
combo j3 :blobheart:
rhydon516   22
N an hour ago by blueprimes
Source: USAJMO 2025/3
Let $m$ and $n$ be positive integers, and let $\mathcal R$ be a $2m\times 2n$ grid of unit squares.

A domino is a $1\times2$ or $2\times1$ rectangle. A subset $S$ of grid squares in $\mathcal R$ is domino-tileable if dominoes can be placed to cover every square of $S$ exactly once with no domino extending outside of $S$. Note: The empty set is domino tileable.

An up-right path is a path from the lower-left corner of $\mathcal R$ to the upper-right corner of $\mathcal R$ formed by exactly $2m+2n$ edges of the grid squares.

Determine, with proof, in terms of $m$ and $n$, the number of up-right paths that divide $\mathcal R$ into two domino-tileable subsets.
22 replies
rhydon516
Mar 20, 2025
blueprimes
an hour ago
Portia's vs. Lara's school
MathArt4   24
N an hour ago by JetFire008
Source: 2021 AMC 10A #2
Portia’s high school has $3$ times as many students as Lara’s high school. The two high schools have a total of
$2600$ students. How many students does Portia’s high school have?

$\textbf{(A) }600 \qquad \textbf{(B) }650 \qquad \textbf{(C) }1950 \qquad \textbf{(D) }2000 \qquad \textbf{(E) }2050$
24 replies
MathArt4
Feb 5, 2021
JetFire008
an hour ago
No more topics!
F=ma USAPhO qualification
RabtejKalra   5
N Mar 21, 2025 by torch
Which would be more benificial to USAPhO qualification, doing the AoPS physics courses (Intro to Physics all the way to F=ma Problem Series) or doing the first half of HRK?
5 replies
RabtejKalra
Mar 20, 2025
torch
Mar 21, 2025
F=ma USAPhO qualification
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RabtejKalra
47 posts
#1
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Which would be more benificial to USAPhO qualification, doing the AoPS physics courses (Intro to Physics all the way to F=ma Problem Series) or doing the first half of HRK?
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Pengu14
436 posts
#2
Y by
HRK probably
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Alex-131
5304 posts
#3
Y by
Pengu14 wrote:
HRK probably

^ and sprinkle in some f=mas timed before the real test.
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Narwhal234
30 posts
#4
Y by
As a sertified HRK hater, I recommend blue morin in its full and then just do kevin zhou.
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eg4334
614 posts
#5
Y by
you can just read hrk and some kz mech handouts
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torch
998 posts
#6
Y by
RabtejKalra wrote:
Which would be more benificial to USAPhO qualification, doing the AoPS physics courses (Intro to Physics all the way to F=ma Problem Series) or doing the first half of HRK?

as a usapho qualifier, blue morin was probably the best helpful.
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