Need your quick help with anti-spam questions & answers

Guys, we've switched on the question/answer technique to fight the spambots. I am thinking of including few basic engineering related questions (easier to answer). Why not contribute a few questions below? We'd be fine with about 5-10 questions. 😀

All I could think of were the basic physics and mechanics related questions. Like F=Ma, Velocity = Distance / Time and so on.

The answer has to be a 'word' or a 'number'. For example, we'd present the following question at the time of registration

Velocity = Distance / { ? } -> User enters 'time' as answer.

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  • Harshad Italiya
    Harshad Italiya

    @harshad-ukH5ww • Dec 26, 2012

    These two comes in my mind

    1) 1 Celcius = 33.8 Farenheit
    2) E= MC2

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  • Kaustubh Katdare
    Kaustubh Katdare

    @thebigk • Dec 27, 2012

    Nice. Looking forward to more suggestions. I hope we'll be able to setup a better Q/A captcha.

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  • Anoop Kumar
    Anoop Kumar

    @anoop-kumar-GDGRCn • Dec 27, 2012

    Value of Gravity (g): 9.8
    Change 4 into binary: 100
    Value of Pi: 3.14
    Speed of sound in vacuum: 0
    Atomic mass of hydrogen: 1
    Chemical formula of water: H2O

    captcha option will beenabled after selecting branch and questions will be from the specific branch set.

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  • Kaustubh Katdare
    Kaustubh Katdare

    @thebigk • Dec 27, 2012

    Okay, we're on to something now. We can definitely pick up a few questions. I even wonder whether we should make it a little more complicated to sign-up so that spammers stay away?

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  • Harshad Italiya
    Harshad Italiya

    @harshad-ukH5ww • Dec 27, 2012

    The_Big_KOkay, we're on to something now. We can definitely pick up a few questions. I even wonder whether we should make it a little more complicated to sign-up so that spammers stay away?

    We have to choose general formulas as there are users from all engineering branch right?

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  • durga ch
    durga ch

    @durga-TpX3gO • Dec 27, 2012

    welcome home: ---.0.0.1
    and the answer is 127.0.0.1

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  • Saandeep Sreerambatla
    Saandeep Sreerambatla

    @saandeep-sreerambatla-hWHU1M • Dec 27, 2012

    What is the formula for Ohm's law?

    I = V /R or someone will say V = IR

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  • Harshad Italiya
    Harshad Italiya

    @harshad-ukH5ww • Jan 8, 2013

    Here is one more CAPTCHA I come to know while surfing through one blog:

    3 x Two = ?
    ? x 3 = Nine

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  • lal
    lal

    @lal-R60Xjx • Jan 8, 2013

    Choose a renewable source of energy among the following
    (a) Petroleum (b) Coal (c) Sun (d) Uranium

    Which among the following does not store energy
    (a) Fly wheel (b) Spring (c) Battery (d) Copper wire

    The devise which revolutionised electronics industr
    (a) Transformer (b) Diode (c) Transistor (d) Capacitor

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