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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]
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0 replies
jlacosta
May 1, 2025
0 replies
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AIME Resources
senboy   2
N 18 minutes ago by senboy
I am currently in 6th grade and am about halfway done with the intro to algebra class. I plan to take the intro to geometry class, and self study from the intro to counting and probability book, aops volume 1, and competition math for middle school by the end of next year(before amc). I mock about a 18-20 on the amc 8, and I don't really know what my amc 10/12 score would be. I'm aiming for at least a DHR next year in amc 8 and hopefully aime qual(btw I live in australia)
1) would I need to to the intermediate series and/or aops volume 2 for aime qual?
2)What are some books that would really help me prep for amc10/12 and aime?
3)what are some specific topics that you think would be useful for me to cover for aime qual?
4) Should I also do intro to number theory or is that not necessary?
2 replies
senboy
6 hours ago
senboy
18 minutes ago
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[Signups Now!] - Inaugural Academy Math Tournament
elements2015   2
N 20 minutes ago by Penguin117
Hello!

Pace Academy, from Atlanta, Georgia, is thrilled to host our Inaugural Academy Math Tournament online through Saturday, May 31.

AOPS students are welcome to participate online, as teams or as individuals (results will be reported separately for AOPS and Georgia competitors). The difficulty of the competition ranges from early AMC to mid-late AIME, and is 2 hours long with multiple sections. The format is explained in more detail below. If you just want to sign up, here's the link:

https://forms.gle/ih548axqQ9qLz3pk7

If participating as a team, each competitor must sign up individually and coordinate team names!

Detailed information below:

Divisions & Teams
[list]
[*] Junior Varsity: Students in 10th grade or below who are enrolled in Algebra 2 or below.
[*] Varsity: All other students.
[*] Teams of up to four students compete together in the same division.
[list]
[*] (If you have two JV‑eligible and two Varsity‑eligible students, you may enter either two teams of two or one four‑student team in Varsity.)
[*] You may enter multiple teams from your school in either division.
[*] Teams need not compete at the same time. Each individual will complete the test alone, and team scores will be the sum of individual scores.
[/list]
[/list]
Competition Format
Both sections—Sprint and Challenge—will be administered consecutively in a single, individually completed 120-minute test. Students may allocate time between the sections however they wish to.

[list=1]
[*] Sprint Section
[list]
[*] 25 multiple‑choice questions (five choices each)
[*] recommended 2 minutes per question
[*] 6 points per correct answer; no penalty for guessing
[/list]

[*] Challenge Section
[list]
[*] 18 open‑ended questions
[*] answers are integers between 1 and 10,000
[*] recommended 3 or 4 minutes per question
[*] 8 points each
[/list]
[/list]
You may use blank scratch/graph paper, rulers, compasses, protractors, and erasers. No calculators are allowed on this examination.

Awards & Scoring
[list]
[*] There are no cash prizes.
[*] Team Awards: Based on the sum of individual scores (four‑student teams have the advantage). Top 8 teams in each division will be recognized.
[*] Individual Awards: Top 8 individuals in each division, determined by combined Sprint + Challenge scores, will receive recognition.
[/list]
How to Sign Up
Please have EACH STUDENT INDIVIDUALLY reserve a 120-minute window for your team's online test in THIS GOOGLE FORM:
https://forms.gle/ih548axqQ9qLz3pk7
EACH STUDENT MUST REPLY INDIVIDUALLY TO THE GOOGLE FORM.
You may select any slot from now through May 31, weekdays or weekends. You will receive an email with the questions and a form for answers at the time you receive the competition. There will be a 15-minute grace period for entering answers after the competition.
2 replies
elements2015
May 12, 2025
Penguin117
20 minutes ago
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4th grader qual JMO
HCM2001   54
N 2 hours ago by Anir_Op
i mean.. whattttt??? just found out about this.. is he on aops? (i'm sure he is) where are you orz lol..
https://www.mathschool.com/blog/results/celebrating-success-douglas-zhang-is-rsm-s-youngest-usajmo-qualifier
54 replies
HCM2001
May 22, 2025
Anir_Op
2 hours ago
J
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geo equals ForeBoding For Dennis
dchenmathcounts   99
N Today at 6:23 AM by Yiyj
Source: USAJMO 2020/4
Let $ABCD$ be a convex quadrilateral inscribed in a circle and satisfying $DA < AB = BC < CD$. Points $E$ and $F$ are chosen on sides $CD$ and $AB$ such that $BE \perp AC$ and $EF \parallel BC$. Prove that $FB = FD$.

Milan Haiman
99 replies
dchenmathcounts
Jun 21, 2020
Yiyj
Today at 6:23 AM
J
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AMC changes
DPatrick   3
N Dec 2, 2010 by dragon96
Today the American Mathematics Competitions announced changes to the AMC10/12 - AIME - USA(J)MO series of contests for high school students.

There are two major changes:

1. The cutoff score to advance from the AMC10 to the AIME is still 120, but in the event that fewer than 2.5% of all students score 120 or higher, they will lower the cutoff score so that the top 2.5% of students advance. (In previous years this percentage was 1%.) (Also, no changes for advancement from AMC12 to AIME: it's still 100 or the top 5%.)

2. Students can qualify for the USAMO only by taking the AMC12. Students can qualify for the USAJMO only by taking the AMC10. If a student takes both the AMC10 and AMC12 and qualifies for both olympiads, he or she must take the USAMO.

Official rules are on the AMC's website. Discussion continues on our AMC forum.
3 replies
DPatrick
Dec 1, 2010
dragon96
Dec 2, 2010
J
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climate change
ChuMath   3
N Apr 25, 2025 by Ilikeminecraft
Source: 2024 AMC 8 P10
In January 1980 the Moana Loa Observation recorded carbon dioxide levels of 338 ppm (parts per million). Over the years the average carbon dioxide reading has increased by about 1.515 ppm each year. What is the expected carbon dioxide level in ppm in January 2030? Round your answer to the nearest integer.

$\textbf{(A) } 399\qquad\textbf{(B) } 414\qquad\textbf{(C) } 420\qquad\textbf{(D) } 444\qquad\textbf{(E) } 459$

3 replies
ChuMath
Jan 25, 2024
Ilikeminecraft
Apr 25, 2025
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climate change
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AMC 8
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Source: 2024 AMC 8 P10
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ChuMath
289 posts
ChuMath
#1 h  Jan 25, 2024, 4:36 PM
Y by
In January 1980 the Moana Loa Observation recorded carbon dioxide levels of 338 ppm (parts per million). Over the years the average carbon dioxide reading has increased by about 1.515 ppm each year. What is the expected carbon dioxide level in ppm in January 2030? Round your answer to the nearest integer.

$\textbf{(A) } 399\qquad\textbf{(B) } 414\qquad\textbf{(C) } 420\qquad\textbf{(D) } 444\qquad\textbf{(E) } 459$
Z K Y
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fruitmonster97
2506 posts
fruitmonster97
#2 h  Jan 25, 2024, 5:04 PM • 3 Y
Y by ChuMath, DuoDuoling0, Novmath
B right? simply $338+1.515*50.$
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JH_K2IMO
131 posts
JH_K2IMO
#3 h  Dec 17, 2024, 7:53 AM
Y by
2030-1980=50.
Over 50 years, the carbon dioxide level increases by 1.515 x 50 = 75.75.
338+75.75=413.75
The answer is (B) 414.
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Ilikeminecraft
677 posts
Ilikeminecraft
#4 h  Apr 25, 2025, 6:07 PM
Y by
Solved with ST2009 and Awesomeness_in_a_bun

$338 + 1.515\cdot50 = 338 + 75.75 = 413.75$ which gives B
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