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gugeren的博客
有则写之，无则空之
	https://blog.creaders.net/u/5804/ > 复制 > 收藏本页

我的名片

gugeren

注册日期: 2012-01-06
访问总量: 3,059,826 次

· 【美国时事通】当被捕杀者成为猎

· 【RRN】白帽逮捕一宾夕法尼亚州

· 【RRN】军方将清洗叛国军官

· 【RRN】FBI局长Wray被控叛国罪但

· 【美国时事通】川普胜选后，她要

· 【RRN】海军陆战队逮捕马约卡斯

· 【美国时事通】911，J6等真相将

【DIY】

【数学】

【美国大学申请】

· 美国劳工部对2010-2020年劳动力

【杂记】

【股票+金融】

【自己文章】

【转贴好文章】

· 【RRN】FBI局长Wray被控叛国罪但

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发表评论

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评论：

趣味的数学 - 30

趣味的数学 - 30

一个菌群的细菌数量每12小时增加1倍。一个可容纳1,000,000个细菌的培养皿在13天后就充满了细菌。

问一个可容纳2,000,000个细菌的培养皿培养同样种类的细菌多少天可以被充满？

【转引自Edward J. Barbeau等编著的“Five hundred Mathematical Challenges”第291题。】