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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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[PMO19 Qualis] I.2 Minimum of x given absolute value
aops-g5-gethsemanea2   0
4 hours ago
Let $a,b>0$. If $|x-a|\le a+b$, then what is the minimum value of $x$?

$\text{(a) }-2a-b\qquad\text{(b) }-a-b\qquad\text{(c) }a\qquad\text{(d) }-b$

Answer confirmation
0 replies
aops-g5-gethsemanea2
4 hours ago
0 replies
[PMO19 Qualis] I.1 Power of 27 Three Times
LilKirb   0
5 hours ago
If $27^3 + 27^3 + 27^3 = 27^x,$ what is the value of $x$?

$\text{(a) }\frac{10}{3}\qquad\text{(b) }4\qquad\text{(c) }9\qquad\text{(d) }12$

Answer Confirmation
0 replies
LilKirb
5 hours ago
0 replies
Random but useful theorems
booking   116
N 6 hours ago by Kushagra2012
There have been all these random but useful theorems
Please post any theorems you know, random or not, but please say whether they are random or not.
I'll start give an example:
Random
I am just looking for some theorems to study.
116 replies
booking
Jul 16, 2025
Kushagra2012
6 hours ago
9 MathDash
booking   29
N Today at 4:19 AM by stopyappingbwo
If you pay for MathDash, specifically lessons, could you please give feedback below?
29 replies
booking
Jul 6, 2025
stopyappingbwo
Today at 4:19 AM
1234th Post!
PikaPika999   270
N Today at 4:14 AM by vincentwant
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: $(4-3)\cdot(2-1)$
270 replies
PikaPika999
Apr 21, 2025
vincentwant
Today at 4:14 AM
Bogus Proof Marathon
pifinity   7783
N Today at 1:53 AM by valenbb
Hi!
I'd like to introduce the Bogus Proof Marathon.

In this marathon, simply post a bogus proof that is middle-school level and the next person will find the error. You don't have to post the real solution :P

Use classic Marathon format:
[hide=P#]a1b2c3[/hide]
[hide=S#]a1b2c3[/hide]


Example posts:

P(x)
-----
S(x)
P(x+1)
-----
Let's go!! Just don't make it too hard!
7783 replies
pifinity
Mar 12, 2018
valenbb
Today at 1:53 AM
9 Favorite topic
A7456321   258
N Today at 1:41 AM by PojoDotCom
What is your favorite math topic/subject?

If you don't know why you are here, go binge watch something!

If you forgot why you are here, go to a hospital! :)

If you know why you are here and have voted, maybe say why you picked the option that you picked in a response) :thumbup:

CLICK ON ME YOU KNOW YOU WANT TO

Timeline
258 replies
A7456321
May 23, 2025
PojoDotCom
Today at 1:41 AM
Website to learn math
hawa   187
N Today at 1:09 AM by Spacepandamath13
Hi, I'm kinda curious what website do yall use to learn math, like i dont find any website thats fun to learn math
187 replies
hawa
Apr 9, 2025
Spacepandamath13
Today at 1:09 AM
Quadratics, Cubics, and Quartics Marathon
vmene   0
Today at 12:31 AM
Welcome to the Quadratics, Cubics, and Quartics marathon! We will be including real and imaginary solutions!
post your problems and solutions like [code]P1[/code] and [code]S1[/code]. I will start: P1:)hint
0 replies
vmene
Today at 12:31 AM
0 replies
The 24 Game Only Basic Operations
maxamc   61
N Today at 12:13 AM by huajun78
Use the numbers $1,2,3,4,5,6,7,8,9,10$ (you must use all numbers) and the operations $+,-,\cdot,\div$ ONLY to create all positive integers in order. I will repeat 1 more time: ONLY these 4 operations (no concatenation or anything like totient etc.)

This is a real challenge compared to all postfarming attempts over the years.

Solutions
61 replies
maxamc
Jul 25, 2025
huajun78
Today at 12:13 AM
AMC 10 Registry
Crimzion   14
N Jun 9, 2025 by OGMATH
Just wondering how do i apply for amc 10 this year, maa website says info about last years.
14 replies
Crimzion
Jun 5, 2025
OGMATH
Jun 9, 2025
AMC 10 Registry
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Crimzion
2 posts
#1 • 1 Y
Y by GA34-261
Just wondering how do i apply for amc 10 this year, maa website says info about last years.
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sasu1ke
154 posts
#2 • 1 Y
Y by GA34-261
What I am looking for too.Anyone knows?
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jb2015007
2073 posts
#3 • 1 Y
Y by GA34-261
wait for info from your cm
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sasu1ke
154 posts
#4 • 1 Y
Y by GA34-261
CM?Who is that?
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jb2015007
2073 posts
#5 • 1 Y
Y by GA34-261
Competition manager
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nxchman
58 posts
#6 • 1 Y
Y by GA34-261
I just searched up amc 10 registration in my city and I found a university near me which proctors it.
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sasu1ke
154 posts
#7 • 1 Y
Y by GA34-261
Where to do it in australia?
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OGMATH
295 posts
#8 • 1 Y
Y by GA34-261
I think we have to wait in the Fall / late Summer to register for it.
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Crimzion
2 posts
#9 • 1 Y
Y by GA34-261
what if i dont have a cm?
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dragon888
58 posts
#10 • 1 Y
Y by GA34-261
Crimzion wrote:
what if i dont have a cm?

You can register online i think
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Ruegerbyrd
1139 posts
#11
Y by
when do they tell us the dates for this year?
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OGMATH
295 posts
#12
Y by
You can find the dates here: https://maa.org/student-programs/amc/

The 2025-26 MAA AMC dates are:
AMC 10 A and AMC 12 A – November 05, 2025
AMC 10 B and AMC 12 B – November 13, 2025
AMC 8 – January 22 to 28, 2026
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AbhayAttarde01
1614 posts
#13
Y by
its june its nowhere near amc10/12 (though you should be studying)
regisration will come somewhere i think in september
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Ruegerbyrd
1139 posts
#14
Y by
the person my school put in charge of running AMCs is really lazy and annoying and I barely got to sign up at a neraby college because he took so long to get confirmed and everything and then made a bunch of excuses. I need to start pushing for registration as soon as dates are out so I can make sure I can take both the AMCs this year at our school :wallbash_red:
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OGMATH
295 posts
#15
Y by
Omg.... :O yeah, the dates are coming soon, so we should all prepare for the exam seriously.....
This post has been edited 3 times. Last edited by OGMATH, Jun 9, 2025, 12:29 AM
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