수학동아 - 폴리매스

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함께 풀고 싶은 문제

나도 수학쌤 문장제 문제를 변형해 문제를 내는 곳입니다.

[문장제 문제&개념응용] 격자판의 중간

우럭 2021.01.03 10:11 조회 411

문제 푼 사람 0명

페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

4 * 4 격자판에 1부터 16까지의 16개 정수를 넣으며고 한다.

각 행에 쓰인 수들 중, 2번째로 큰 수를 R이라는 배열에 넣는다.

이때, R중에서 2번째로 작은 수를 k라고 한다면,

1)이 k가 7이 될 경우의 수는 총 몇 가지인가?

2)그리고 k가 2번째로 큰 수여도 1)의 경우의 수와 같을까?

[풀이필수]

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