수학동아 - 폴리매스

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함께 풀고 싶은 문제

창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.

[창의 퍼즐] 진짜 쉬운 문제[계산]

우럭 2020.06.08 07:45 조회 556

문제 푼 사람 1명

페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

연우는 어떤 물건의 처음 금액을 X로 했다.

사람들이 많이 사자 가격을 30% 올렸고,

이 행동이 공정거래 위원회에 걸려

가격을 40% 줄여야 했다.

최종 가격이 26번째 소수를 십의 자리까지 반올림한 수 일때,

100X는?

이전글 [무한] 무한

다음글 [창의] 두 생일의 차

이 문제 어떠셨나요?

글쎄요

어려워요

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해결

도전

원파 Lv.9 2021.01.07 08:25 비밀댓글

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