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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)!

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[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.
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[*]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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Easy Probability Question with sol
PikaVee   5
N 23 minutes ago by PikaVee
If there was a Pokemon battle where you had a Pikachu that was level 25 with only one move being Thunder with a 70% chance of hitting against a lv 28 1 HP Squirtle that has a 2 x weakness against Electric Type move and outspeeds your Pikachu with 4 total moves. Protect, Tackle, Water Gun and Rain Dance each with an equal chance of happening. The chances of it happening is a/b where a and b are coprime. What is ab?(Note: Only Protect can make the opposing Pokemon immune for one turn)


It is easier to find out the chances of the pokemon fainting in one turn than not so I will start with that. The chance of Pikachu using the move successfully is a 70% chance or $ \frac{7}{10} $ to hit and $ \frac{3}{4} $ that the opposing pokemon will use a not useful move. So $ \frac{7}{10} * \frac{3}{4} = \frac{21}{40} $ so the chances that the opposing pokemon will live for this turn is $1 - \frac{21}{40} $ or $ \frac{19}{40} $. Now that we have a and b we multiply them and $19*40=760$


5 replies
PikaVee
May 28, 2025
PikaVee
23 minutes ago
J
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Overly wordy problems
ZMB038   15
N 27 minutes ago by Rita.Y
Hey everyone, here we can post questions with way to many extraneous words, that are actually easy.
Try to solve the one above yours.
I'll start:
Click to reveal hidden text
15 replies
ZMB038
May 28, 2025
Rita.Y
27 minutes ago
J
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prime numbers
wpdnjs   128
N 2 hours ago by Yihangzh
does anyone know how to quickly identify prime numbers?

thanks.
128 replies
wpdnjs
Oct 2, 2024
Yihangzh
2 hours ago
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Problem of the day
sultanine   20
N 2 hours ago by EthanNg6
[center]Every day I will post 3 new problems
one easy, one medium, and one hard.
Please hide your answers so others won't be affected
:D :) :D :) :D
20 replies
sultanine
May 23, 2025
EthanNg6
2 hours ago
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No more topics!
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9 MATHCOUNTS STATE difficulty
Eddie_tiger   67
N Apr 4, 2025 by DhruvJha
I personally thought the problems were much easier than last year, but I didn't really improve as much as I would of liked to improve.
67 replies
Eddie_tiger
Apr 1, 2025
DhruvJha
Apr 4, 2025
J
MATHCOUNTS STATE difficulty
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Reveal topic tags
MATHCOUNTS
poll
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Eddie_tiger
344 posts
Eddie_tiger
#1 h  Apr 1, 2025, 1:13 PM • 1 Y
Y by PikaPika999
9Poll:
How was the difficulty of the problems compared to last year?
171 Votes
58%
(100)
25%
(42)
5%
(9)
5%
(9)
2%
(4)
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I personally thought the problems were much easier than last year, but I didn't really improve as much as I would of liked to improve.
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StrawberriBunni
13 posts
StrawberriBunni
#2 h  Apr 1, 2025, 1:16 PM
Y by
Yeah I sillied target 4 and I ran out of time for the last 3 on sprint, but it was a lot easier than last year.
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c_double_sharp
322 posts
c_double_sharp
#3 h  Apr 1, 2025, 1:19 PM
Y by
sprint: chapter difficulty
target: a bit easier but last year's was also extremely free
team even tho no one cares about team: average, maybe a bit hard
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Eddie_tiger
344 posts
Eddie_tiger
#4 h  Apr 1, 2025, 1:22 PM
Y by
I sold on sprint (27-->22)
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DhruvJha
900 posts
DhruvJha
#5 h  Apr 1, 2025, 1:29 PM
Y by
Arkansas is gonna be so good this year. Highest score in the nation along with the second highest score in the nation.
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orangebear
724 posts
orangebear
#6 h  Apr 1, 2025, 1:30 PM
Y by
Easier than last Year tho I sillied 3 questions on the sprint and 1 on target :stink:
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Existing_Human1
214 posts
Existing_Human1
#7 h  Apr 1, 2025, 1:37 PM
Y by
Where can I find solutions and papers?
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DhruvJha
900 posts
DhruvJha
#8 h  Apr 1, 2025, 1:37 PM
Y by
Existing_Human1 wrote:
Where can I find solutions and papers?

It'll come out soon enough
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Existing_Human1
214 posts
Existing_Human1
#9 h  Apr 1, 2025, 1:38 PM
Y by
Today? $ $
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DhruvJha
900 posts
DhruvJha
#10 h  Apr 1, 2025, 1:38 PM
Y by
Existing_Human1 wrote:
Today? $ $

Yes
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Existing_Human1
214 posts
Existing_Human1
#11 h  Apr 1, 2025, 1:43 PM
Y by
What did you get for sprint #8
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hashbrown2009
193 posts
hashbrown2009
#12 h  Apr 1, 2025, 1:53 PM
Y by
My younger brother said the target round was insanely easy
sprint was moderate
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orangebear
724 posts
orangebear
#13 h  Apr 1, 2025, 2:07 PM
Y by
There is a kid in my state (PA) who might make nationals who has autism (Has there ever been a kid with autism who made Nats?)
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Inaaya
423 posts
Inaaya
#14 h  Apr 1, 2025, 2:15 PM
Y by
idk i didn't even qual states last year
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Acumlus
17 posts
Acumlus
#15 h  Apr 1, 2025, 2:19 PM
Y by
orangebear wrote:
There is a kid in my state (PA) who might make nationals who has autism (Has there ever been a kid with autism who made Nats?)

I feel as this question is really offensive
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