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[잡담] 1랩이 시험공부하다 심심해서 동생과 만든 문제
쉘던쿠퍼 2020.07.12 08:42 조회 854
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페이스북 트위터 카카오톡 카카오스토리 네이버블로그 네이버밴드

어,,, 폴하? 안녕하세요 ㅋㅋ 1랩 사보에 잠수타고 수학공부중에 심심해서 딴짓하다 문제가 생겨서 왔습니다 어,,,,, 저와 제 동생이 같이 머리 맞대고 만들어 푼 문젠데 저희가 만든거지만 정답을 확신할수가 없어서 여기다가 질문겸 문제로 올려봅니다(사보에도 똑같이 올릴겁니다)

금산기업 자커 번호 자물쇠 XH35_이미지

다들 이 자물쇠 아시죠 자 그럼 문제 들어갑니다 빠빠빰

 

1.이 자물쇠로 만들수 있는 2자리수의 조합은 몇가지일까요

 

2.이 자물쇠로 만들수 있는 3자리수의 조합은 몇가지일까

 

3.이 자물쇠로 만들수 있는 4자리수의 조합은 몇가지일까요

 

자 여기까지 읽으신 분중에 아~ 쉽네 하고 생각하시는 분들도 있으실건데 하지만 조건이 있습니다

 

조건

1.이 자물쇠는 어떤순서로 누르든 열리기 때문에 수의 순서는 상관이 없다 (예:1234=4321=2341=3421....은 모두 같은걸로 판단한다)

뭐,,, 이것밖에 없는것 같네요 그럼 저는 문제가 풀릴때까지 기다려 보겠습니다 그럼 사바~~ 아 아니 폴바~~

 

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    아인수타인 Lv.12 2020.07.12 08:44 비밀댓글

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    •  
      쉘던쿠퍼 Lv.1 2020.07.12 08:47

      저,,,, c가 뭔지좀요,,, 저 수동 구독 안했어요 ㅠㅠ

      좋아요0
  •  
    아인수타인 Lv.12 2020.07.12 08:50 비밀댓글

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    •  
      쉘던쿠퍼 Lv.1 2020.07.12 08:51

      그럼 답을 적어주세요 ㅠㅠ

      좋아요0
  •  
    아인수타인 Lv.12 2020.07.12 08:54 비밀댓글
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    •  
      쉘던쿠퍼 Lv.1 2020.07.12 09:06

      공식이 있다니 더럽네요 ㅠㅠ 개고생했어요ㅠㅠㅠㅠ 동생이 이론을 세우길래 그거 증명하니라고 힘들었습니다 ㅠㅠ

      좋아요0
    •  
      은총알 Lv.11 2020.07.12 23:54

      흠 아인수타인님이 해결하신 것 같으니..

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    △π Lv.9 2020.07.12 15:48 비밀댓글
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