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함께 풀고 싶은 문제
창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.
[창의 퍼즐] 나의 나이
21세기오일러 2019.03.03 01:38 조회 797
문제 푼 사람 0명
공유하기
페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

i에게는 형과 아버지가 있다 대화를 듣고 물음에 답하여라

i :나와 내형의 나이의 곱은 208, 나와 아버지의 나이의 곱은 585, 형과 아버지의 나이의 곱은 720이야

e:그래? 그것만으로는 너의 나이를 알 수 없어.

\pi: i의 나이의 3제곱과 형의 나이의 3제곱과 아버지의 나이의 3제곱의 합은 97418이래.

1:그래도 ***가지의 경우나 있는데?

0:내가알기로 i와 형의 나이차는 3살이야

e:그러면 **가지중 하나군.

i: 나는 19년 후에 내 나이가 아버지의 나이의 절반과 같아져

e:아, 너의 나이를 알겠다!

 

1)세사람의 나이를 구하라

2)***을 구하라

3)**을 구하라

이 문제 어떠셨나요?

글쎄요

0

어려워요

0

문제 찜하기 목록보기
댓글 12
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  •  
    21세기오일러 Lv.11 2019.03.03 01:39

    *은 모두 같은 숫자가 아닙니다

    댓글 작성하기 좋아요0 댓글수5
    •  
      sincostan Lv.7 2019.03.03 01:44

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      이거 설마e^{i\Pi }+1=0가지고 문제 만든 건가요?

      좋아요0
    •  
      21세기오일러 Lv.11 2019.03.03 01:44

      넵 그리고 i의 나이는 제 나이입니다.

      좋아요0
    •  
      sincostan Lv.7 2019.03.04 07:43 비밀댓글
      비밀 댓글이 등록 되었습니다!
    •  
      21세기오일러 Lv.11 2019.03.06 23:28

      알파고zero님보디 한 살 적은 이제 초6입니다

      과학천재,김태이와 같은나이고 또 여백패르마님과 동갑입니다(믿기진 않지만)

      좋아요0
    •  
      로보카폴리 Lv.11 2019.10.15 04:52

      안녕하세요 저는 김태이라고 합니다

      좋아요0
  •  
    퍼즐-Scratch Lv.5 2019.03.03 03:19

    문제가 조금 이상한 거 같은데요 ㅠㅠ

    내 나이 a 형 나이 b 아빠 나이 c

    a*b = 207   a*c = 585   b*c = 720

    위 세 숫자를 모두 곱하면 a*b*a*c*b*c = (a*b*c)2 = 207 * 585* 720 = 87188400

    하지만 87188400은 제곱수가 아니라서 a, b, c가 무리수로 나옵니다. 

    그리고 87188400이 제곱수가 되도록 수를 바꿔도 a*b*c 를 알 수 있기 때문에 

    a = (a*b*c) / (b*c) 이런 식으로 a, b, c를 바로바로 알아낼 수 있습니다. 

    댓글 작성하기 좋아요0 댓글수3
    •  
      아인수타인 Lv.12 2019.03.03 03:50

      어, 그러네요?

      좋아요0
    •  
      깜냥 Lv.1 2019.03.03 05:37

      알고보니 나이를 생일 기준으로 날짜까지 세는 거여서 24와 29/365살이다 이런 거일 수도...

      좋아요0
    •  
      21세기오일러 Lv.11 2019.03.03 05:43

      죄송합니다 207이 아니라 208입니다

      수정했습니다

      또 오류도 있네요 퍼즐&scratch님의 방법을 쓰지 않고 구해보세요 

      문제를 검토 안해서 정말 죄송합니다

      좋아요1
  •  
    퍼즐-Scratch Lv.5 2019.03.03 07:24

    내 나이 = 13

    형 나이 = 16

    아빠 나이 = 45

    댓글 작성하기 좋아요0 댓글수1
    •  
      21세기오일러 Lv.11 2019.03.04 07:27

      네,맞습니다

      풀이도 써주세요

      좋아요0

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