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Function: driver
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Function: get_footer
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Function: require_once
수학동아 - 폴리매스
함께 풀고 싶은 문제
창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.
문제은행
2020.06.21 09:33
조회 926
원래 에라토스 테네스의 체는 소수가 아닌 수를 걸러낸다 하지만 고장난 에라토스 테네스의 체는 소수와 소수의 곱도 걸러내지 않는다
그렇다면 200 이하의 수들중에서 고장난 에라토스테네스의 체에 걸러지지 않고 나오는 수는 모두 몇개일까
저는 소수와 소수*소수의 곱을 따로 따로 구했습니다 더 좋은 방법이 있다면 댓글로 알려주세요
문제 봐주셔서 감사합니다
-
매스파이
Lv.8
2020.06.21 17:58
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아인수타인
Lv.12
2020.06.21 21:41
말머리는 [정수]로 하시면 될 것 같습니다.
(지금 폰이라 치는 게 좀 불편하네요... 좀 이따 컴이나 패드로 할 때 다시 볼게요)
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222
Lv.9
2020.06.22 05:21
흐음.. 소수의 곱은 소수의 제곱, 세제곱 등이란 건가요
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아엘
Lv.7
2020.06.22 05:55
소수들의 곱 아닐까요? 예를 들어 2곱하기 3인 6도 걸러지지 않는거죠.
좋아요0
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문제은행
Lv.5
2020.06.23 03:58
두 소수의 곱입니다^^
불편을 드려 죄송합니다
좋아요0
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아엘
Lv.7
2020.06.22 08:13
비밀댓글
비밀 댓글이 등록 되었습니다.
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문제은행
Lv.5
2020.06.23 04:00
비밀댓글
비밀 댓글이 등록 되었습니다!
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아인수타인
Lv.12
2020.06.23 00:21
비밀댓글
비밀 댓글이 등록 되었습니다.
-
문제은행
Lv.5
2020.06.23 03:57
지금 바로
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