An Obvious Theorem


The last theorem in John H. Conway’s book, On Numbers and Games (1976), is:

Theorem 100: This is the last theorem in this book.
(The proof is obvious.)


About Edmark M. Law

My name Edmark M. Law. I work as a freelance writer, mainly writing about science and mathematics. I am an ardent hobbyist. I like to read, solve puzzles, play chess, make origami and play basketball. In addition, I dabble in magic, particularly card magic and other sleight-of-hand type magic. I live in Hong Kong. I blog at You can find me on Twitter @EdmarkLaw and Facebook. My email is
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12 Responses to An Obvious Theorem

  1. mistermuse says:

    But what does 100 proof prove?

    Liked by 1 person

  2. So happy to be informed.

    Liked by 1 person

  3. Abigail says:

    An example of the humorous side of mathematicians. When you wade through abstractions to which others roll their eyes, you need to include some line, punch or otherwise, that will draw them back.

    Liked by 1 person

  4. Arooba says:

    nice nice

    Liked by 1 person

  5. Jack Shalom says:

    This post makes me ask if you have done anything about Raymond Smullyan.

    Liked by 1 person

    • I have only read 2 of his books (What is the name of this book and The Lady or the Tiger). His other books are on my to be read list but I can’t find the time for it. Thanks for reminding me. Might as well read one of his books this weekend.


  6. masercot says:

    “We hold these truths to be self-evident…”

    Liked by 4 people

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