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수학동아 - 폴리매스
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함께 풀고 싶은 문제
나도 수학쌤 문장제 문제를 변형해 문제를 내는 곳입니다.
[문장제 문제&개념응용] 간단하게 내는 문제(난이도 ◇)
Funmaster 2022.08.07 09:26 조회 141
문제 푼 사람 0명
공유하기
페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

보다시피 문제는 간단합니다.

 

1.There is a number that is 123456789101112131415....(you know the patterns)......84858687888990919293949596979899100. If you have to erase 100 numbers,erase properly to make the highest one.

번역: 숫자 123456789101112131415...(규칙 알죠?)...8687888990919293949596979899100이 있다, 100개의 숫자를 지워 가장 높은 숫자를 만들어라(숫자는 1자리 단위).

2.어떠한 정n각형이 서로 교차하지 않는 대각선들에 의해 삼각형들로 나누어진다. 이 다각형의 모든 꼭짓점이 홀수개의 삼각형의 공통 꼭짓점일 때,3|n임을 증명해라.

이 문제 어떠셨나요?

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  •  
    NULL Lv.6 2022.08.07 21:28

    3작대기?n이 뭔지 모르겠어요!

    댓글 작성하기 좋아요0 댓글수2
    •  
      Funmaster Lv.7 2022.08.07 21:31

      n은 3의 배수,즉 3으로 나누어떨어진다는 뜻입니다.

      좋아요0
    •  
      NULL Lv.6 2022.08.07 21:35

      감사합니다!!!

      좋아요0
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