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k a March Highlights and 2025 AoPS Online Class Information
jlacosta   0
Mar 2, 2025
March is the month for State MATHCOUNTS competitions! Kudos to everyone who participated in their local chapter competitions and best of luck to all going to State! Join us on March 11th for a Math Jam devoted to our favorite Chapter competition problems! Are you interested in training for MATHCOUNTS? Be sure to check out our AMC 8/MATHCOUNTS Basics and Advanced courses.

Are you ready to level up with Olympiad training? Registration is open with early bird pricing available for our WOOT programs: MathWOOT (Levels 1 and 2), CodeWOOT, PhysicsWOOT, and ChemWOOT. What is WOOT? WOOT stands for Worldwide Online Olympiad Training and is a 7-month high school math Olympiad preparation and testing program that brings together many of the best students from around the world to learn Olympiad problem solving skills. Classes begin in September!

Do you have plans this summer? There are so many options to fit your schedule and goals whether attending a summer camp or taking online classes, it can be a great break from the routine of the school year. Check out our summer courses at AoPS Online, or if you want a math or language arts class that doesn’t have homework, but is an enriching summer experience, our AoPS Virtual Campus summer camps may be just the ticket! We are expanding our locations for our AoPS Academies across the country with 15 locations so far and new campuses opening in Saratoga CA, Johns Creek GA, and the Upper West Side NY. Check out this page for summer camp information.

Be sure to mark your calendars for the following events:
[list][*]March 5th (Wednesday), 4:30pm PT/7:30pm ET, HCSSiM Math Jam 2025. Amber Verser, Assistant Director of the Hampshire College Summer Studies in Mathematics, will host an information session about HCSSiM, a summer program for high school students.
[*]March 6th (Thursday), 4:00pm PT/7:00pm ET, Free Webinar on Math Competitions from elementary through high school. Join us for an enlightening session that demystifies the world of math competitions and helps you make informed decisions about your contest journey.
[*]March 11th (Tuesday), 4:30pm PT/7:30pm ET, 2025 MATHCOUNTS Chapter Discussion MATH JAM. AoPS instructors will discuss some of their favorite problems from the MATHCOUNTS Chapter Competition. All are welcome!
[*]March 13th (Thursday), 4:00pm PT/7:00pm ET, Free Webinar about Summer Camps at the Virtual Campus. Transform your summer into an unforgettable learning adventure! From elementary through high school, we offer dynamic summer camps featuring topics in mathematics, language arts, and competition preparation - all designed to fit your schedule and ignite your passion for learning.[/list]
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0 replies
jlacosta
Mar 2, 2025
0 replies
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help me at this pls i'm so confused
myname17042005   12
N 2 minutes ago by sqing
if a, b, c are real numbers and a, b, c >0, prove that
pls help meee
12 replies
+1 w
myname17042005
Jun 12, 2020
sqing
2 minutes ago
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Cool problem
jkim0656   0
5 minutes ago
Hey AoPS!
I came across a problem recently and it goes like this:
Which is greater:
$$2 ^ {100!} $$or $$2^{100}!$$Soo... can u guys help? thx!
:yoda: and may the force be with u!
Notes: I don't exactly know where this problem came from, but if u find that u are the orig maker of this problem feel free to drop me a PM and ill add u to my post :)
0 replies
jkim0656
5 minutes ago
0 replies
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Inequalities
nhathhuyyp5c   2
N 17 minutes ago by nhathhuyyp5c
Let $a,b,c$ be positive reals such that $a+b+c+2=abc$. Find the maximum value of $$\frac{a+1}{a^2+2}+\frac{b+1}{b^2+2}+\frac{c+1}{c^2+2}$$Given $n\ge 2$ non-zero reals $x_1,x_2,\cdots x_n$ such that their sum is $100$. Prove that there exists two numbers $x_i,x_j$ such that $\frac{1}{2}\le \left|\frac{x_i}{x_j}\right|\le 2$
2 replies
nhathhuyyp5c
Jan 10, 2025
nhathhuyyp5c
17 minutes ago
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Inequalities
sqing   5
N 30 minutes ago by sqing
Let $ a, b\geq 0 $ and $ \frac {a^2+a+1}{b^2-b+1}+\frac {b^2+b+1}{a^2-a+1} \geq 3 $. Prove that
$$ a+b+a^2+b^2 \geq 28-6\sqrt{21}$$Let $ a, b\geq 0 $ and $ \frac {a^2+a+1}{b^2-b+1}+\frac {b^2+b+1}{a^2-a+1} \geq 4 $. Prove that
$$ a+b+a^2+b^2 \geq 10-4\sqrt 5$$Let $ a, b\geq 0 $ and $ \frac {a^2+a+1}{b^2-b+1}+\frac {b^2+b+1}{a^2-a+1} \geq 5 $. Prove that
$$ a+b+a^2+b^2 \geq \frac {2(26-5\sqrt{13})}{9} $$Let $ a, b\geq 0 $ and $\frac {a^2+a+1}{b^2-b+1}+\frac {b^2+b+1}{a^2-a+1}\geq 3+ \sqrt {5} $. Prove that
$$ a+b+a^2+b^2 \geq 2$$
5 replies
1 viewing
sqing
Mar 14, 2025
sqing
30 minutes ago
J
No more topics!
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Combination Problem - Relay 1
Silverfalcon   1
N Feb 14, 2008 by unimpossible
Do these problems fast. If you get two other people to do with you, that's even better as well. :)

R1 - 1. The product of five consecutive positive integers is divisible by both 13 and 31. If that product is as small as possible, compute the smallest of the five integers.

R1 - 2. Let $ T = TNYWR$ and let $ K = \frac{T-1}{15}$.
Compute the value of $ (1 - i)^{2K}$.

R1 - 3. Three vertices of a cube are connected to form a triangle. Compute the maximum possible perimeter of this triangle if the edge of the cube is $ T$.
1 reply
Silverfalcon
Feb 14, 2008
unimpossible
Feb 14, 2008
J
Combination Problem - Relay 1
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Reveal topic tags
geometry
3D geometry
perimeter
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Silverfalcon
5006 posts
Silverfalcon
#1 h  Feb 14, 2008, 12:17 AM • 2 Y
Y by Adventure10, Mango247
Do these problems fast. If you get two other people to do with you, that's even better as well. :)

R1 - 1. The product of five consecutive positive integers is divisible by both 13 and 31. If that product is as small as possible, compute the smallest of the five integers.

R1 - 2. Let $ T = TNYWR$ and let $ K = \frac{T-1}{15}$.
Compute the value of $ (1 - i)^{2K}$.

R1 - 3. Three vertices of a cube are connected to form a triangle. Compute the maximum possible perimeter of this triangle if the edge of the cube is $ T$.
Z K Y
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unimpossible
1520 posts
unimpossible
#2 h  Feb 14, 2008, 12:41 AM • 2 Y
Y by Adventure10, Mango247
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