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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] 한장의 명곡
루트23 2020.08.30 00:17 조회 474
문제 푼 사람 0명
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페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

재기는 명곡을 모으는 취미가 있었다. 근데 어느날 정민이가 재기의 집에 가보니 CD 가 한장밖에 없었습니다. 

정민: 어, 재기야, 왜 CD가 한장밖에 없어???

재기: 아, 이 한장은 네가 진짜 아끼는 건데, 내가 내는 문제를 맞추면 이걸 줄께!

정민: 우아우아! 얼른 내 봐!

재기: 난 CD중에서 절반과 반 장을 미여에게 주고, 그리고 남은 CD중에서 절반과 또 반 장을 윤지에게 줬어. 그랬더니 CD 한 장밖에 안 남은 거야. 내가 처음에는 몇장의 CD를 가지고 있었던 걸까? 

문제의 해답은?

이 문제 어떠셨나요?

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