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수학동아 - 폴리매스
함께 풀고 싶은 문제
창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.
K→C≡N
2019.11.20 16:15
조회 695
휠릭과 튈릭은 점심을 다 먹고 교실로 올라왔다.
튈릭이 양치하러 가려고 할 때, 휠릭이 튈릭에게 말했다.
"너 정말 이상해."
그러자,
튈릭:왜?
휠릭:사람에 어이가 달렸느니, 일어나는데 갑자기 뭔 일본어얘기, 비키라는데 비에 젖는다는 둥 이상한 얘기만 하잖아.
튈릭:너가 더 이상해.
휠릭:왜?
튈릭:너처럼 이를 안닦으면 충치균때문에 이가 상한다고.
휠릭:한 번 안닦았다고 이 안상하거든.
튈릭:그건 그렇긴 하지.
이빨 하나는 25개의 타일 모양의 정사각형이라고 가정하자.
이를 한 번 안닦을 때 마다 그 중 무작위로 한 타일이 충치균에게 점령당한다고 하자.
휠릭:그래서?
튈릭:그리고 지뢰찾기계수(상하좌우대각선에 지뢰(여기서는 충치균)가 있는 개수)가 2이상이라면, 그 타일도 감염이 돼.
문제:그러면 이가 완전히 충치균에 의해 감염되는 데 걸리는 이 안닦는 횟수의 최소와 최대는?
-
K→C≡N
Lv.11
2019.11.20 16:16
그래서 최대 몇 번 이를 안닦아도 되고 최소 몇번 이를 안닦을 수 있는지를 묻는 문제입니다.
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Cantor
Lv.3
2019.11.20 23:38
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