Infinite series

I can’t believe how long it’s taken me to solve this Perplex City card. I’d sort of given up on it, but still had it around. Today, I picked it up while waiting for a package to build, and the answer just came to me. Duh.

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Tim Waugh

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2 responses to “Infinite series”

  1. Darien avatar
    Darien

    I’ve heard this one before, but I love it. I like things where the answer is obvious if you switch your head about.

  2. tim avatar
    tim

    Great, isn’t it? Also, yesterday I was explaining to Sue about the wayback machine, and how cool it is, and she pointed out that it might be helpful for “Can you identify these four dot.gone companies?” (another Perplex City card I’ve been holding on to).

    Now why didn’t I think of that?