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수학동아 - 폴리매스
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함께 풀고 싶은 문제
창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.
[창의 퍼즐] 삼각수인 사각수
아인수타인 2019.01.04 09:49 조회 710
문제 푼 사람 0명
공유하기
페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

삼각수이면서 사각수인 수 중 가장 작은 수는? (단, 1은 제외)

이 문제 어떠셨나요?

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댓글 6
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  •  
    알럽매쓰 Lv.1 2019.01.04 11:13

    1 아닌가요?

    댓글 작성하기 좋아요0 댓글수5
    •  
      알럽매쓰 Lv.1 2019.01.04 11:15

      1 제외한다고 하면 36이겠네요.

      좋아요0
    •  
      아인수타인 Lv.12 2019.01.05 09:59

      아, 1 제외입니다. 그리고 정답입니다. 해결 붙여주세요.

       

      추신: 다음 몇 개만 해 보면 특별한 수가 나올 겁니다.

      좋아요0
    •  
      알럽매쓰 Lv.1 2019.01.07 08:29

      그 다음은 엄청 커지네요...35의 제곱이니깐 1225...

      좋아요0
    •  
      아인수타인 Lv.12 2019.01.08 09:15

      네. 제가 말한 그 '특별한 수'가 1225입니다. (이유는 12월 25일은?)

      좋아요0
    •  
      알럽매쓰 Lv.1 2019.01.08 09:21

      아...!

      좋아요0
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