Stay ahead of learning milestones! Enroll in a class over the summer!

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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
AMC 10 Preparation over 6 months
raresillypanther   3
N 8 minutes ago by franklin2013
Hi, I'm currently in 8th grade and I have about 6 months left to prepare for the AMC 10, and I really want to qualify for AIME and get above a 100. I took the AMC 8 this year and did really bad, with a score of 16, and a 35 on the MATHCOUNTS Chapter test. I have a feeling I would get about a 70 on the AMC 10 now, so I want to be able to improve by 30 points in 6 months. Is that possible? I have summer break coming up so I feel like I could study for about 4 hours a day every single day, and I'm willing to if that's what it takes. Do you have any ideas for what resources I should use? I know about Alcumus and I have some of the AOPS books, but not all of them. If you have any tips, let me know. Thank you so much!
3 replies
raresillypanther
an hour ago
franklin2013
8 minutes ago
2025 MATHCOUNTS State Hub
SirAppel   596
N 34 minutes ago by Eddie_tiger
Previous Years' "Hubs": (2022) (2023) (2024)Please Read

Now that it's April and we're allowed to discuss ...
[list=disc]
[*] CA: 43 (45 44 43 43 43 42 42 41 41 41)
[*] NJ: 43 (45 44 44 43 39 42 40 40 39 38) *
[*] NY: 42 (43 42 42 42 41 40)
[*] TX: 42 (43 43 43 42 42 40 40 38 38 38)
[*] MA: 41 (45 43 42 41)
[*] WA: 41 (41 45 42 41 41 41 41 41 41 40) *
[*]VA: 40 (41 40 40 40)
[*] FL: 39 (42 41 40 39 38 37 37)
[*] IN: 39 (41 40 40 39 36 35 35 35 34 34)
[*] NC: 39 (42 42 41 39)
[*] IL: 38 (41 40 39 38 38 38)
[*] OR: 38 (44 39 38 38)
[*] PA: 38 (41 40 40 38 38 37 36 36 34 34) *
[*] MD: 37 (43 39 39 37 37 37)
[*] AZ: 36 (40? 39? 39 36)
[*] CT: 36 (44 38 38 36 35 35 34 34 34 33 33 32 32 32 32)
[*] MI: 36 (39 41 41 36 37 37 36 36 36 36) *
[*] MN: 36 (40 36 36 36 35 35 35 34)
[*] CO: 35 (41 37 37 35 35 35 ?? 31 31 30) *
[*] GA: 35 (38 37 36 35 34 34 34 34 34 33)
[*] OH: 35 (41 37 36 35)
[*] AR: 34 (46 45 35 34 33 31 31 31 29 29)
[*] NV: 34 (41 38 ?? 34)
[*] TN: 34 (38 ?? ?? 34)
[*] WI: 34 (40 37 37 34 35 30 28 29 29 29) *
[*] HI: 32 (35 34 32 32)
[*] NH: 31 (42 35 33 31 30)
[*] DE: 30 (34 33 32 30 30 29 28 27 26? 24)
[*] SC: 30 (33 33 31 30)
[*] IA: 29 (33 30 31 29 29 29 29 29 29 29 29 29) *
[*] NE: 28 (34 30 28 28 27 27 26 26 25 25)
[*] SD: 22 (30 29 24 22 22 22 21 21 20 20)
[/list]
Cutoffs Unknown

* means that CDR is official in that state.

Notes

For those asking about the removal of the tiers, I'd like to quote Jason himself:
[quote=peace09]
learn from my mistakes
[/quote]

Help contribute by sharing your state's cutoffs!
596 replies
SirAppel
Apr 1, 2025
Eddie_tiger
34 minutes ago
1234th Post!
PikaPika999   148
N 3 hours ago by iwastedmyusername
I hit my 1234th post! (I think I missed it, I'm kinda late, :oops_sign:)

But here's a puzzle for you all! Try to create the numbers 1 through 25 using the numbers 1, 2, 3, and 4! You are only allowed to use addition, subtraction, multiplication, division, and parenthesis. If you're post #1, try to make 1. If you're post #2, try to make 2. If you're post #3, try to make 3, and so on. If you're a post after 25, then I guess you can try to make numbers greater than 25 but you can use factorials, square roots, and that stuff. Have fun!

1: $(4-3)\cdot(2-1)$
148 replies
PikaPika999
Yesterday at 8:54 PM
iwastedmyusername
3 hours ago
k NO WAY RICHARD RUSCYK REPLIED TO MY MESSAGE
nmlikesmath   0
3 hours ago
CHAT THIS IS UNREAL
TYSM RICHARD THANK YOU SO MUCH
0 replies
+1 w
nmlikesmath
3 hours ago
0 replies
No more topics!
Marble Math
ilovebender   1
N Apr 15, 2025 by EthanNg6
John has 10 marbles with the colors red, green, or blue, all either transparent or translucent. He arranged them in a circle with the following conditions:

3 marbles right beside each other cannot be the same color
The marble across from any marble (assuming John makes a perfect circle) cannot be the same color
Red cannot be in between 2 blues
Blue cannot be between 2 greens
Green cannot be between two Reds

How many different ways can John organize these marbles? State "Impossible" if you think there is no solution. State "Undefined" if one rule doesn't follow another

What if John arranged them into two rows with 5 marbles each all right beside each other. What about 5 rows with 2 marbles each?

Post your answer down below

I just thought of this question right off the top of my head, and I didn't have time to do it, but I'd love to see your answers!

Edit: I just realized "What if John arranged them into two rows with 5 marbles each all right beside each other. What about 5 rows with 2 marbles each?" Is a bit confusing, what I meant was that if you arrange the marbles 2 by 5 (one on the top), the arrow points to what is across from that marble. Same with the 5 by 2, the arrows point that is across.
1 reply
ilovebender
Mar 18, 2021
EthanNg6
Apr 15, 2025
Marble Math
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G H BBookmark kLocked kLocked NReply
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ilovebender
210 posts
#1
Y by
John has 10 marbles with the colors red, green, or blue, all either transparent or translucent. He arranged them in a circle with the following conditions:

3 marbles right beside each other cannot be the same color
The marble across from any marble (assuming John makes a perfect circle) cannot be the same color
Red cannot be in between 2 blues
Blue cannot be between 2 greens
Green cannot be between two Reds

How many different ways can John organize these marbles? State "Impossible" if you think there is no solution. State "Undefined" if one rule doesn't follow another

What if John arranged them into two rows with 5 marbles each all right beside each other. What about 5 rows with 2 marbles each?

Post your answer down below

I just thought of this question right off the top of my head, and I didn't have time to do it, but I'd love to see your answers!

Edit: I just realized "What if John arranged them into two rows with 5 marbles each all right beside each other. What about 5 rows with 2 marbles each?" Is a bit confusing, what I meant was that if you arrange the marbles 2 by 5 (one on the top), the arrow points to what is across from that marble. Same with the 5 by 2, the arrows point that is across.
Attachments:
This post has been edited 1 time. Last edited by ilovebender, Mar 18, 2021, 2:56 AM
Reason: confusing
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EthanNg6
22 posts
#2
Y by
The translucent and transparent part is not needed to solve the problem
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