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k a April Highlights and 2025 AoPS Online Class Information
jlacosta   0
Apr 2, 2025
Spring is in full swing and summer is right around the corner, what are your plans? At AoPS Online our schedule has new classes starting now through July, so be sure to keep your skills sharp and be prepared for the Fall school year! Check out the schedule of upcoming classes below.

WOOT early bird pricing is in effect, don’t miss out! If you took MathWOOT Level 2 last year, no worries, it is all new problems this year! Our Worldwide Online Olympiad Training program is for high school level competitors. AoPS designed these courses to help our top students get the deep focus they need to succeed in their specific competition goals. Check out the details at this link for all our WOOT programs in math, computer science, chemistry, and physics.

Looking for summer camps in math and language arts? Be sure to check out the video-based summer camps offered at the Virtual Campus that are 2- to 4-weeks in duration. 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 events:
[list][*]April 3rd (Webinar), 4pm PT/7:00pm ET, Learning with AoPS: Perspectives from a Parent, Math Camp Instructor, and University Professor
[*]April 8th (Math Jam), 4:30pm PT/7:30pm ET, 2025 MATHCOUNTS State Discussion
April 9th (Webinar), 4:00pm PT/7:00pm ET, Learn about Video-based Summer Camps at the Virtual Campus
[*]April 10th (Math Jam), 4:30pm PT/7:30pm ET, 2025 MathILy and MathILy-Er Math Jam: Multibackwards Numbers
[*]April 22nd (Webinar), 4:00pm PT/7:00pm ET, Competitive Programming at AoPS (USACO).[/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
Apr 2, 2025
0 replies
Is my approach right?
cowcheese   1
N 4 minutes ago by YauYauFilter
Source: AMC12B 2019 p11
How many unordered pairs of edges of a given cube determine a plane?

a. 12. b. 28 c. 36 d. 42. e. 66

I ended up with the right answer. However, no solutions resembled the way I did it, which is why I'm skeptical. After a few failed attempts with other ways of solving (didn't get an answer in the answer options), I decided to use complementary counting, and counted invalid pairs (pairs that don't satisfy the condition given by the problem). To do that I drew out the cube and found for each side, there are 4 sides that will make an invalid pair with it. Because there are 12 sides to a cube, I did 12*4. But, each distinct pair in that 12*4 is counted twice. So, dividing 12*4 by 2 will give 24 invalid pairs. Now, for total pairs, it is 12 choose 2, which is 66. 66-24 = 42. Hence, the answer is 42.

So, is there anything wrong with the way I did it? Is there a specific reason this wasn't a posted solution?

Thanks!
1 reply
cowcheese
Yesterday at 9:33 PM
YauYauFilter
4 minutes ago
mdk2013
Mar 30, 2025
fidgetboss_4000
15 minutes ago
Discuss the Stanford Math Tournament Here
Aaronjudgeisgoat   203
N 44 minutes ago by rhydon516
I believe discussion is allowed after yesterday at midnight, correct?
If so, I will put tentative answers on this thread.
By the way, does anyone know the answer to Geometry Problem 5? I was wondering if I got that one right
Also, if you put answers, please put it in a hide tag

Answers for the Algebra Subject Test
Estimated Algebra Cutoffs
Answers for the Geometry Subject Test
Estimated Geo Cutoffs
Answers for the Discrete Subject Test
Estimated Cutoffs for Discrete
Answers for the Team Round
Guts Answers
203 replies
Aaronjudgeisgoat
Yesterday at 1:44 PM
rhydon516
44 minutes ago
2025 Math and AI 4 Girls Competition: Win Up To $1,000!!!
audio-on   47
N 4 hours ago by Lightybird
Join the 2025 Math and AI 4 Girls Competition for a chance to win up to $1,000!

Hey Everyone, I'm pleased to announce the dates for the 2025 MA4G Competition are set!
Applications will open on March 22nd, 2025, and they will close on April 26th, 2025 (@ 11:59pm PST).

Applicants will have one month to fill out an application with prizes for the top 50 contestants & cash prizes for the top 20 contestants (including $1,000 for the winner!). More details below!

Eligibility:
The competition is free to enter, and open to middle school female students living in the US (5th-8th grade).
Award recipients are selected based on their aptitude, activities and aspirations in STEM.

Event dates:
Applications will open on March 22nd, 2025, and they will close on April 26th, 2025 (by 11:59pm PST)
Winners will be announced on June 28, 2025 during an online award ceremony.

Application requirements:
Complete a 12 question problem set on math and computer science/AI related topics
Write 2 short essays

Prizes:
1st place: $1,000 Cash prize
2nd place: $500 Cash prize
3rd place: $300 Cash prize
4th-10th: $100 Cash prize each
11th-20th: $50 Cash prize each
Top 50 contestants: Over $50 worth of gadgets and stationary


Many thanks to our current and past sponsors and partners: Hudson River Trading, MATHCOUNTS, Hewlett Packard Enterprise, Automation Anywhere, JP Morgan Chase, D.E. Shaw, and AI4ALL.

Math and AI 4 Girls is a nonprofit organization aiming to encourage young girls to develop an interest in math and AI by taking part in STEM competitions and activities at an early age. The organization will be hosting an inaugural Math and AI 4 Girls competition to identify talent and encourage long-term planning of academic and career goals in STEM.

Contact:
mathandAI4girls@yahoo.com

For more information on the competition:
https://www.mathandai4girls.org/math-and-ai-4-girls-competition

More information on how to register will be posted on the website. If you have any questions, please ask here!


47 replies
audio-on
Jan 26, 2025
Lightybird
4 hours ago
No more topics!
USAMO Scores Release Date
CrunchyCucumber   14
N Apr 2, 2025 by CatCatHead
Does anyone know when individual scores, and medal+MOP cutoffs on the USAMO will be officially released? The website says 2-3 weeks, but I’ve heard it takes much longer in previous year.
14 replies
CrunchyCucumber
Apr 1, 2025
CatCatHead
Apr 2, 2025
USAMO Scores Release Date
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CrunchyCucumber
63 posts
#1
Y by
Does anyone know when individual scores, and medal+MOP cutoffs on the USAMO will be officially released? The website says 2-3 weeks, but I’ve heard it takes much longer in previous year.
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damathgoat
118 posts
#2
Y by
Nope sorry bro :(
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RaymondZhu
4002 posts
#3
Y by
some time between now and mop
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mathfan2010
3 posts
#4
Y by
One dude said today that he got mopped. He received many congrats in the group and it did not sound April fools joke.
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bjump
999 posts
#5
Y by
mathfan2010 wrote:
One dude said today that he got mopped. He received many congrats in the group and it did not sound April fools joke.

It was an admittedly bad April fools joke :oops:
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mathfan2010
3 posts
#6
Y by
The guy is a top mathlete in the group and there was no sign of joking . Just wonder if anyone else also received USAMO/USAJMO results or news related MOP.

If the thread includes MOP in the topic, that may help attract more responses.
This post has been edited 4 times. Last edited by mathfan2010, Apr 2, 2025, 12:51 PM
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lu1376091
13 posts
#7
Y by
i was told that jmo cutoffs came out today
april foolsed by dotted calculator :blush:
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hashbrown2009
164 posts
#8
Y by
mathfan2010 wrote:
The guy is a top mathlete in the state and there was no sign of joking (he kept accepting congrats throughout the day without admitting it's a joke). Just wonder if anyone else also received USAMO/USAJMO results or news related MOP.

If the thread includes MOP in the topic, that may help attract more responses.

No MOP cutoffs came out today. It was likely a troll or a April Fool's Joke with everyone saying congrats to continue the joke. Again, No MOP cutoff results came today.

Also: r u an alt account because your AoPS acc only was created today and has only 2 posts
This post has been edited 2 times. Last edited by hashbrown2009, Apr 2, 2025, 12:48 AM
Reason: miswrite
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DottedCaculator
7333 posts
#9
Y by
lu1376091 wrote:
i was told that jmo cutoffs came out today
april foolsed by dotted calculator :blush:

jmo cutoffs came out a few weeks ago though
Z K Y
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mathfan2010
3 posts
#10
Y by
Yes my account is new because I did not post in the past. Bro, USAJMO or USAMO cutoffs came out on March 4. Everybody knows that.
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hashbrown2009
164 posts
#11
Y by
mathfan2010 wrote:
Yes my account is new because I did not post in the past. Bro, USAJMO or USAMO cutoffs came out on March 4. Everybody knows that.

"I did not post in the past"
Your account was made April 1st, 2025. Is that not today?

edit: ik I miswrote USAJMO/USAMO cutoffs did not come out but I meant MOP. Sorry for the confusion.
This post has been edited 1 time. Last edited by hashbrown2009, Apr 2, 2025, 12:48 AM
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fake123
86 posts
#12
Y by
hashbrown2009 wrote:
mathfan2010 wrote:
Yes my account is new because I did not post in the past. Bro, USAJMO or USAMO cutoffs came out on March 4. Everybody knows that.

"I did not post in the past"
Your account was made April 1st, 2025. Is that not today?

edit: ik I miswrote USAJMO/USAMO cutoffs did not come out but I meant MOP. Sorry for the confusion.

no "april 1st, 2025" is not "today" idk what ur on about
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rhydon516
550 posts
#13 • 1 Y
Y by elasticwealth
gaslighting = entertainment :popcorn:
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xHypotenuse
770 posts
#14
Y by
sometime between today and mop
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CatCatHead
30 posts
#15
Y by
last year the medal list come on 4/25, and the mop email come some days earlier
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