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수학동아 - 폴리매스
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[수학자] 숫자13 이야기
수학동아 2018.12.28 02:57 조회 891
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페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

 

한 해는 1월부터 12월까지 12개의 달로 이루어진다. 13은 간발의 차로 달력에 등장할 수 없게 된 안타까운 수다. 또한 13은 불길한 숫자라는 편견 때문에 종종 엘리베이터에도 쓰이지 못하는 등 굴욕을 당하기도 한다. 이처럼 13은 불운의 상징으로 여겨지곤 하지만, 사실 자신만의 매력을 가지고 있는 멋진 숫자다. 이제부터 그 매력을 꼼꼼히 살펴보자.

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#13 #소수 #제곱수 #아르키메데스다면체 #1달러
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