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puzzlist

@puzzlist.bsky.social
124 followers 24 following 363 posts

Mathematician.

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puzzlist @puzzlist.bsky.social · 31/12/2025
In East Asian calendar, 2026 is the year of the horse. #alphametic #복면산 #覆面算 pbs.twimg.com/media/G9fceI...
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puzzlist @puzzlist.bsky.social · 24/10/2025
대한수학회 수학달력 2026
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puzzlist @puzzlist.bsky.social · 23/10/2025
안될과학 라이브 직관 중. 민태기 박사님의 역작 판타레이의 등장인물들 캐리커처와 이들 사이의 관계를 표시한 포스터가 나왔다.
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puzzlist @puzzlist.bsky.social · 15/08/2025
#기하문제 339 #GeometryProblem 339 Some lines were drawn on a right triangle. What is the angle?
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puzzlist @puzzlist.bsky.social · 19/07/2025
며칠 전 치러진 국제수학올림피아드(IMO) 결과가 발표되었다. 우리나라는 3위. 중-미-한-일-폴-이스-인-싱-벳-튀 순. imo-official.org/year_country... 우리나라 팀 6명에 정말 오랜만에 여학생이, 그것도 중2 여학생이 선발되어서 화제였는데, 성적도 좋아서 72명에게 준 금메달도 받았다. 아마 최연소 금메달 수상자 명단에도 이름을 올릴 수 있을 듯. 올해는 마지막 6번 문제가 꽤 어려웠나 보다. 600명이 넘는 참가자 가운데 이 문제에서 7점 만점을 받은 학생이 여섯 명뿐이었다.
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puzzlist @puzzlist.bsky.social · 22/06/2025
Two isosceles triangles ▷ and ▽ were drawn on a square. What are the ratios a:b:c and x:y:z?
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puzzlist @puzzlist.bsky.social · 21/06/2025
화학과 전용 노트패드.
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puzzlist @puzzlist.bsky.social · 17/06/2025
오늘의 케이크.
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puzzlist @puzzlist.bsky.social · 16/06/2025
-든/-던 잘못 쓴 글 볼 때마다 고통스러운 1인으로서 이걸 어떻게 쉽게 구별하게 할 수 있을까 자주 생각해 봤는데, 이미 천재들이 다 해놨음. ㅋ x.com/ssabu_7/stat...
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puzzlist @puzzlist.bsky.social · 18/04/2025
#기하문제 337 #GeometryProblem 337 A trapezoid/trapezium was drawn on a square by using midpoints and circles. What fraction is shaded?
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puzzlist @puzzlist.bsky.social · 26/03/2025
오늘 출근 길에 마주친 상황. 전방 카메라임. ㅋ
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puzzlist @puzzlist.bsky.social · 11/03/2025
정삼각형을 분할하여 정사각형을 만드는 듀드니 퍼즐의 네 조각짜리 해법이 최적임이 증명되었다고. Dudeney's Dissection is Optimal Erik D. Demaine, Tonan Kamata, Ryuhei Uehara arxiv.org/abs/2412.03865
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puzzlist @puzzlist.bsky.social · 27/02/2025
#기하문제 336 #GeometryProblem 336 A kite was drawn on a regular hexagon by using midpoints. What fraction is shaded?
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puzzlist @puzzlist.bsky.social · 13/02/2025
#기하문제 335 #GeometryProblem 335 One more thing. What fraction is shaded?
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puzzlist @puzzlist.bsky.social · 04/02/2025
#기하문제 334 #GeometryProblem 334 OK. How about this? What fraction is shaded?
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puzzlist @puzzlist.bsky.social · 03/02/2025
#기하문제 333 #GeometryProblem 333 Another isosceles triangle was drawn on a regular hexagon by using midpoints. What fraction is shaded?
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puzzlist @puzzlist.bsky.social · 11/01/2025
#기하문제 332 #GeometryProblem 332 An isosceles triangle was drawn on a regular hexagon by using a diagonal and midpoints. What fraction is shaded?
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puzzlist @puzzlist.bsky.social · 01/01/2025
Happy New Year! In East Asia, 2025 is the year of the snake. ABAC = (AB+AC)^A #복면산 #alphametic #覆面算
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puzzlist @puzzlist.bsky.social · 17/12/2024
오늘 현대대수학 기말고사 문제. 마침 12월 17일이어서 204=12x17이기도. 그러고 보니 5월 17일은 전두환의 신군부가 비상계엄을 전국으로 확대한 날이기도.
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puzzlist @puzzlist.bsky.social · 30/11/2024
도넛이 컵으로 변하는 중.
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puzzlist @puzzlist.bsky.social · 26/11/2024
#기하문제 331 #GeometryProblem 331 A heptagon was drawn on a regular hexagon by using midpoints. What fraction is shaded?
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puzzlist @puzzlist.bsky.social · 18/11/2024
#기하문제 330 #GeometryProblem 330 A pentagon was drawn on a regular hexagon by using midpoints. What fraction is shaded?
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puzzlist @puzzlist.bsky.social · 27/10/2024
#기하문제 329 #GeometryProblem 329 A quadrilateral was drawn on a regular hexagon by using midpoints. What fraction is shaded?
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puzzlist @puzzlist.bsky.social · 14/10/2024
#기하문제 328 #GeometryProblem 328 A pentagon was drawn on a square by using midpoints. What fraction is shaded?
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puzzlist @puzzlist.bsky.social · 25/09/2024
#기하문제 327 #GeometryProblem 327 A quadrilateral was drawn on a square by using midpoints. What fraction is shaded?
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puzzlist @puzzlist.bsky.social · 15/09/2024
#기하문제 326 #GeometryProblem 326 A kite was drawn on a square by using midpoints. What fraction is shaded?
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puzzlist @puzzlist.bsky.social · 06/09/2024
#기하문제 325 #GeometryProblem 325 A triangle was drawn on a square by using midpoints. What fraction is shaded?
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puzzlist @puzzlist.bsky.social · 31/08/2024
#기하문제 324 #GeometryProblem 324 Four regions were drawn by drawing two segments on a triangle. The areas of three regions are 1, 2, and 3. What is the area of the shaded quadrilateral?
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puzzlist @puzzlist.bsky.social · 24/08/2024
#기하문제 323 #GeometryProblem 323 Four regions were drawn by drawing two segments on a square. The areas of three regions are 1, 4, and 9. What is the area of the shaded quadrilateral?
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puzzlist @puzzlist.bsky.social · 16/08/2024
#기하문제 322 #GeometryProblem 322 A regular hexagon was drawn on a regular nonagon. What is the angle?
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puzzlist @puzzlist.bsky.social · 15/08/2024
#기하문제 321 #GeometryProblem 321 A triangle was drawn on three regular hexagons. What fraction is shaded? Indeed, almost the same problem was asked before.
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puzzlist @puzzlist.bsky.social · 14/08/2024
지수귀문도, 루비크 큐브의 신의 수(god's number), 우표전지
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puzzlist @puzzlist.bsky.social · 14/08/2024
오늘 발행된 “재미있는 수학” 기념 우표
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puzzlist @puzzlist.bsky.social · 08/08/2024
#기하문제 320 #GeometryProblem 320 Easy one. 30 sec cut. 😉 A triangle was drawn on a regular hexagon by diagonals. What fraction is shaded?
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puzzlist @puzzlist.bsky.social · 01/08/2024
#기하문제 319 #GeometryProblem 319 A triangle was drawn on a regular hexagon by a midpoint and an intersection point. What fraction is shaded?
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puzzlist @puzzlist.bsky.social · 25/07/2024
#기하문제 318 #GeometryProblem 318 A triangle was drawn on a regular hexagon in another way. What fraction is shaded?
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puzzlist @puzzlist.bsky.social · 18/07/2024
#기하문제 317 #GeometryProblem 317 A triangle was drawn on a regular hexagon. What fraction is shaded?
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puzzlist @puzzlist.bsky.social · 08/07/2024
#기하문제 316 #GeometryProblem 316 Two triangles were drawn on a regular hexagon by drawing a perpendicular line. What is the ratio [Green]:[Orange]?
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puzzlist @puzzlist.bsky.social · 03/07/2024
#기하문제 315 #GeometryProblem 315 Two triangles were drawn on a regular hexagon. What is the ratio [Green]:[Orange]?
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puzzlist @puzzlist.bsky.social · 28/06/2024
#기하문제 314 #GeometryProblem 314 Now, four triangles were drawn on a regular hexagon. What is the ratio of four regions?
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puzzlist @puzzlist.bsky.social · 19/06/2024
#기하문제 313 #GeometryProblem 313 Two triangles were drawn on a regular hexagon. What is the ratio [Green]:[Orange]?
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puzzlist @puzzlist.bsky.social · 11/06/2024
#기하문제 312 #GeometryProblem 312 Two lines were drawn on a triangle. What fraction is shaded?
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puzzlist @puzzlist.bsky.social · 04/06/2024
#기하문제 311 #GeometryProblem 311 Two equilateral triangles were drawn overlapped on a regular hexagon. What is the ratio A:B:C of three kites?
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puzzlist @puzzlist.bsky.social · 29/05/2024
#기하문제 310 #GeometryProblem 310 Three equilateral triangles were drawn in a regular hexagon. What is the ratio A:B:C of areas of three trianges?
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puzzlist @puzzlist.bsky.social · 25/05/2024
#기하문제 309 #GeometryProblem 309 Easy one. Two squares were overlapped. What is the ratio of areas of two squares?
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puzzlist @puzzlist.bsky.social · 19/05/2024
#기하문제 308 #GeometryProblem 308 Three triangles were drawn on a square. What is the ratio A:B:C of three shaded areas?
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puzzlist @puzzlist.bsky.social · 14/05/2024
#기하문제 307 #GeometryProblem 307 Three right triangles were drawn on a square. What is the ratio of three shaded areas?
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puzzlist @puzzlist.bsky.social · 06/05/2024
#기하문제 306 #GeometryProblem 306 A right triangle was drawn on a square. What fraction is shaded?
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puzzlist @puzzlist.bsky.social · 03/05/2024
채점 중.
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puzzlist @puzzlist.bsky.social · 01/05/2024
#기하문제 305 #GeometryProblem 305 (Left) Three equilateral triangles were drawn on a square. (Right) Another equilateral triangle was drawn on the square. What is the ratio x:y?
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