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수학동아 - 폴리매스
함께 풀고 싶은 문제
창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.
수짱이
2020.04.17 01:54
조회 518
수짱인 일주일에 2번 문제 10개를 올릴 려고 한다
하지만 수짱이는 일주일에 1번 필요 없는 문제 1개를 지우고 일주일에 3번 은 문제를 1.5개를 낸다
그러면 1년동안에는 얼마나 많은 문제를 낼까?
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△π
Lv.9
2020.04.17 02:01
문제의 의도를 명확하게 해주셔야 합니다.
1년동안에는 얼마나 많은 문제를 낼까?라는 것은 문제를 내는 갯수만 따지기 때문에 지우는 것은 의미가 없어집니다.
또한, 1년은 정확히 일주일로 나누어 떨어지지 않고, 하루가 남습니다.
이 하루에 10개를 올리는지, 1.5개를 올리는지, 혹은 올리지 않는지 전혀 알 수 없습니다.
따라서 이 문제의 답은 "알 수 없음"입니다.
만약 이 문제를 올바르게 고친다면,
이 해는 어느 요일에서 시작하고, 어느 요일에는 10개를 내고, 어느 요일에는 1.5개를 내며, 어느 요일에는 문제 1개를 지운다.
이 때, 1년이 지난 후 수짱이의 문제중 폴리매스에 올라와 있는 문제의 숫자를 구하여라. 이정도가 되겠군요.
-
수짱이
Lv.7
2020.04.17 02:04
좋아요0
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조이
Lv.8
2020.04.17 18:12
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