On verification

There are many ways to avoid bots spamming your blog post with insane comments. The most widely used one is word verification. I stumbled upon a site which asked simple math’s questions for verification. Cool isn’t but the one I saw asked some simple questions on arithmetic like what is 1 + 70? Wondering what if some tough questions are asked, if so will any one dare to comment?

May be when a scientist/mathematician may have the following questions to verify if the commenter is bot or a person.

  • Sin (π/2) =

  • Sin2 (φ) + Cos2 (φ) =

  • 1 + 1/2-1 + 1/3-1 + 1/4-1 + 1/5-1 + …+ 1/n-1 =

  • e=

  • E =

  • Π =

  • C3H8 + 5O2  =

As the majority of people hate maths and science, I do not think people will add these questions for user verification and risk loosing the comments on their post!


5 Responses to “On verification”

  1. 1 S.Karthikeyan July 20, 2006 at 11:59 am

    Venkat, I was aware that you knew all the answers, the confusion came because of the fonts/symbols. Meanwhile the numerical series is truncated version of zeta function the one which comes in Reimann hypothesis. It’s the divergent series for all real numbers the sum diverges and tends to infinity.

  2. 2 Venkat July 20, 2006 at 4:45 am

    What?? I knew those two, it’s just I didn’t think that was what you were asking!

  3. 3 S.Karthikeyan July 13, 2006 at 11:53 am


    E = mc^2
    Pi = circumference/diameter

  4. 4 Venkat July 13, 2006 at 5:30 am

    I can get a few of them.
    The first one: 1
    The Second one: 1
    The third one: don’t know
    Fourth one: -1
    Fifth: don’t know
    Sixth: don’t know
    Seventh one: 3C02 + 4H20 (the combustion of propane)

  1. 1 Avoiding spambots « Renaissance Trackback on November 29, 2006 at 11:46 am

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