やたら楽しい数学
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数学は愉快な物語だ! ! !! !!! !!!!! !!!!!!!! !!!!!!!!!!!!! 東大生です。 囲碁とお笑いが ...
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音频 (38)

3D reversi !!!

Go?

Torus reversi

I Created a God-Tier Math Game
![[The Alchemy Problem] How to Create a Massive Number (International Mathematical Olympiad)](/api/img?u=https%3A%2F%2Fi.ytimg.com%2Fvi%2FCtUyA14SeNs%2Fhqdefault.jpg)
[The Alchemy Problem] How to Create a Massive Number (International Mathematical Olympiad)

Cutting and Fighting Over Sticks: The Hardest Problem from the 2026 International Mathematical Ol...
![[Vieta Jumping] The Hardest International Mathematical Olympiad Problem [Method of Infinite Descent]](/api/img?u=https%3A%2F%2Fi.ytimg.com%2Fvi%2FsrL8lW6OV64%2Fhqdefault.jpg)
[Vieta Jumping] The Hardest International Mathematical Olympiad Problem [Method of Infinite Descent]
![[Weird Sequence] International Mathematical Olympiad 2026, Final Problem, Toughest Question 2](/api/img?u=https%3A%2F%2Fi.ytimg.com%2Fvi%2FUdbOcCN8568%2Fhqdefault.jpg)
[Weird Sequence] International Mathematical Olympiad 2026, Final Problem, Toughest Question 2
![[Math, Mystery, Box] A Serious Mathematical Mystery](/api/img?u=https%3A%2F%2Fi.ytimg.com%2Fvi%2FG3gs5iom-bw%2Fhqdefault.jpg)
[Math, Mystery, Box] A Serious Mathematical Mystery

What is the maximum number of regions a plane can be divided into by N circles?

A "Simple" Puzzle: The Hardest Problem from the International Mathematical Olympiad (Difficulty: ...
![Can You Express "No Line Intersects Three Circles" as an Equation? [IMO Hardest Problem] Difficul...](/api/img?u=https%3A%2F%2Fi.ytimg.com%2Fvi%2FRP6p_vLEAHM%2Fhqdefault.jpg)
Can You Express "No Line Intersects Three Circles" as an Equation? [IMO Hardest Problem] Difficul...
![The World's Hardest Word Problem [International Mathematical Olympiad 2005: Final Problem] Diffic...](/api/img?u=https%3A%2F%2Fi.ytimg.com%2Fvi%2FTp2kKRN0iXo%2Fhqdefault.jpg)
The World's Hardest Word Problem [International Mathematical Olympiad 2005: Final Problem] Diffic...

The Grasshopper Problem: The Hardest Question in IMO History (Difficulty: ★★★★★★)

Reflecting

The math problem I gave my crush in 8th grade

鮮やかな補助線を引く、地面師たち

Your Favorite Math Problem
![[Complete Explanation] Fermat's Last Theorem](/api/img?u=https%3A%2F%2Fi.ytimg.com%2Fvi%2Fo4SkSSfpcRM%2Fhqdefault.jpg)
[Complete Explanation] Fermat's Last Theorem
![The surprisingly fun world of imaginary numbers [The Final Chapter]](/api/img?u=https%3A%2F%2Fi.ytimg.com%2Fvi%2FW2nYeVH-jbM%2Fhqdefault.jpg)
The surprisingly fun world of imaginary numbers [The Final Chapter]

やたら楽しい虚数【始動編】
![[A Strange House] Ama-Kana, who is good at geometry problems [Mathematics]](/api/img?u=https%3A%2F%2Fi.ytimg.com%2Fvi%2FoX0HlcZANu4%2Fhqdefault.jpg)
[A Strange House] Ama-Kana, who is good at geometry problems [Mathematics]

You don't need to do calculations.
![[Everything Connects] A Deep Yet Easy Lesson to Completely Understand Euler's Formula (Including ...](/api/img?u=https%3A%2F%2Fi.ytimg.com%2Fvi%2F5Bc6vNVBw_8%2Fhqdefault.jpg)
[Everything Connects] A Deep Yet Easy Lesson to Completely Understand Euler's Formula (Including ...
![[Point Separation Problem] I'm sure I'll remember this problem someday and cry (IMO 2020 Russia F...](/api/img?u=https%3A%2F%2Fi.ytimg.com%2Fvi%2FY2giOVeIuK4%2Fhqdefault.jpg)
[Point Separation Problem] I'm sure I'll remember this problem someday and cry (IMO 2020 Russia F...
![[Advertisement] Someone who openly advertises (advertisement)](/api/img?u=https%3A%2F%2Fi.ytimg.com%2Fvi%2Fx_nKZFE3mQI%2Fhqdefault.jpg)
[Advertisement] Someone who openly advertises (advertisement)
![[Even middle school students can understand it!] The integer problem that impressed the world](/api/img?u=https%3A%2F%2Fi.ytimg.com%2Fvi%2FxMtkgOYlJGg%2Fhqdefault.jpg)
[Even middle school students can understand it!] The integer problem that impressed the world

People who really want to have a math-related dream on New Year's Day
![Math parody song | Too many numbers, they form lines! [Love it so much it's dead / M!LK]](/api/img?u=https%3A%2F%2Fi.ytimg.com%2Fvi%2FQmKyCt73bh8%2Fhqdefault.jpg)
Math parody song | Too many numbers, they form lines! [Love it so much it's dead / M!LK]

俺が小6の時に作った問題