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Function: driver
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Function: driver
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Cacher.php
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Function: initiateCache
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
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Function: _error_handler
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Function: model
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/libraries/Common.php
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Function: getFloatingMyInfo
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/application/controllers/ver3/Contents.php
Line: 559
Function: get_footer
File: /volume1/web/PhpstormProjects/www_polymath_co_kr/index.php
Line: 315
Function: require_once
수학동아 - 폴리매스
함께 풀고 싶은 문제
창의력을 기를 수 있는 수학 문제 또는 퍼즐을 내는 곳입니다.
[창의 퍼즐] [계산] 문제를 올리기 위한 문제(?)
나는 문제를 올린다.
(1) 100문제가 있는데, 전체 문제의 40%를 올리고 올린 뒤 문제의 25%를 삭제하는 것을 '문제올리기삭제' 라고 한다.
이때, 문제올리기삭제를 몇 번 해야 문제가 200개가 될까?
(2) 100문제가 있는데, 전체 문제의 40%를 올리고 올린 뒤 문제의 30%를 삭제하는 것을 '문제올리기삭제' 라고 할 때,
문제는 계속 줄어들까? 아니면 줄어들다 늘어날까? 계속 늘어날까? 늘어나다 줄어들까?
아니면 줄고 느는 것을 반복할까? 문제의 수의 변화를 구하여라.
(풀이필수, 만약 40%, 25%, 30%가 자연수가 아니라면 소수 부분은 버린다.)
지금 바로
로그인해보세요
로그인 하면 내가 찜한 문제와 수행 평가를 한곳에서 볼 수 있어요!
