led e17 なんだ、みんな人間のせいじゃないか。

＜p＞Lewis Carroll (1832?1898) made his name with his Alice books in the 1860s, but also wrote on popular mathematics ? he was a maths tutor in various capacities at Christ Church College, Oxford, from his undergraduate days until his death.＜/p＞ ＜p＞"A Tangled Tale" is a collection of ten brief humorous puzzles ? called ‘knots’ ? originally published in a monthly magazine in the early 1880s. Each puzzle is described in story form, then summarised as a ‘maths problem’. For the book, Carroll assessed answers sent in by readers, referring to them by name (usually pseudonyms) and grading them, with comments in typically polite-but-cutting Oxford-don fashion.＜/p＞画面が切り替わりますので、しばらくお待ち下さい。

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