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  • Found this puzzle on LinkedIn and I think it's a good mental exercise. Not at all difficult to crack, but should give you a good 30 seconds 😀

    • 9 = 90
    • 8 = 72
    • 7 = 56
    • 6 = 42
    • 3 = ??
    If you take more than 30 seconds to crack this, you've gotta be needing some brain exercise. Spend time on CE and keep your brain engaged!
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  • Igneta D'Souza

    Member • Dec 2, 2013

    12😉
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  • Ankita Katdare

    Administrator • Dec 2, 2013

    18 it should be. Or is this a problem that has multiple correct answers based on assumptions or not-enough-data.
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  • Manashree Thokal

    Member • Dec 2, 2013

    12
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  • Anoop Kumar

    Member • Dec 2, 2013

    12 😀
    x = x*(x+1)
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  • KSS Manian

    Member • Dec 2, 2013

    5 = 30
    4 = 20.
    3 = 12.
    2 = 6.
    1 = 2.

    (or)

    6 = 42
    3 = 18 Which one is right???
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  • Sandeep Taurean

    Member • Dec 6, 2013

    12
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  • Shailaja Tiwari

    Member • Dec 7, 2013

    Kaustubh Katdare
    😀

    • 9 = 90
    • 8 = 72
    • 7 = 56
    • 6 = 42
    • 3 = ??
    time taken<20sec
    ans: 12
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  • Aadit Kapoor

    Member • Dec 7, 2013

    ans : 18 (time taken 9 seconds)

    explanation-:

    9 = 90
    8 * 9 = 72
    7 * 8 = 56
    6 * 7 = 42
    3 * 6 = 18
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  • Sanyam Khurana

    Member • Dec 7, 2013

    12..

    Took like just 2 sec 😛
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  • Anoop Kumar

    Member • Dec 7, 2013

    What is logic for getting 18?
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  • Shailaja Tiwari

    Member • Dec 8, 2013

    ianoop
    What is logic for getting 18?
    they must have done by this way :
    • 9 = 90
    • (8*9=72)
    • 8 = 72
    • ( 7*8=56)
    • 7 = 56
    • (6*7=42)
    • 6 = 42
    • (3*6=18)
    • 3 = ??
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  • Anoop Kumar

    Member • Dec 8, 2013

    Shailaja Tiwari
    they must have done by this way :
    • 9 = 90
    • (8*9=72)
    • 8 = 72
    • ( 7*8=56)
    • 7 = 56
    • (6*7=42)
    • 6 = 42
    • (3*6=18)
    • 3 = ??
    Really this is logic😨 , where did 9=90 came from☕ and why 3 came in series after 6, while other numbers are just x-1.

    Why not x = x*(x+1).
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  • Shailaja Tiwari

    Member • Dec 8, 2013

    9=90 - as 8 is multiplied with its higher consecutive no. 9,similarly they must have added 9 with its higher consecutive no.10.
    and don't know about the series problem ,others may not have noticed it
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  • Shailaja Tiwari

    Member • Dec 8, 2013

    anyway what's the right answer/
    😨
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  • Ajay Pandey

    Member • Dec 8, 2013

    Right answer is 18 or 12 depends on ur logic.In objective exams, options must be either 12 or 18 not both.My answer is 12 bcos first match a pattern and then relation between consecutive options.
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  • Anoop Kumar

    Member • Dec 8, 2013

    Ajay Pandey
    Right answer is 18 or 12 depends on ur logic.In objective exams, options must be either 12 or 18 not both.My answer is 12 bcos first match a pattern and then relation between consecutive options.
    Still not convinced, how some of us getting 18.
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  • Ajay Pandey

    Member • Dec 9, 2013

    8*9=72
    7*8=56
    6*7=42
    3*6=18
    by wrong logic ......😀 right answer is 12
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  • sargam shukla

    Member • Dec 9, 2013

    Kaustubh Katdare
    Found this puzzle on LinkedIn and I think it's a good mental exercise. Not at all difficult to crack, but should give you a good 30 seconds 😀

    • 9 = 90
    • 8 = 72
    • 7 = 56
    • 6 = 42
    • 3 = ??
    If you take more than 30 seconds to crack this, you've gotta be needing some brain exercise. Spend time on CE and keep your brain engaged!
    12
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  • Aadit Kapoor

    Member • Dec 10, 2013

    write a program to print a message without using printf function.
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  • Raj A

    Member • Dec 13, 2013

    12
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  • Sarathkumar Chandrasekaran

    Member • Dec 14, 2013

    12
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  • madhu27

    Member • Dec 18, 2013

    12 or 18 based on our assumption....
    But i think 12 suits the most....
    Took <15 s.....
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  • jeshukb09

    Member • Dec 27, 2013

    18
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  • yogi.bharadwaj

    Member • Dec 28, 2013

    Kaustubh Katdare
    Found this puzzle on LinkedIn and I think it's a good mental exercise. Not at all difficult to crack, but should give you a good 30 seconds 😀

    • 9 = 90
    • 8 = 72
    • 7 = 56
    • 6 = 42
    • 3 = ??
    If you take more than 30 seconds to crack this, you've gotta be needing some brain exercise. Spend time on CE and keep your brain engaged!
    it should be 12
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  • vijay jangid

    Member • Jan 5, 2014

    12
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  • Karthikeyan jaisankar

    Member • Jan 6, 2014

    18🎉
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  • KenJackson

    Member • Jan 7, 2014

    Aadit Kapoor
    write a program to print a message without using printf function.
    At first I thought you must have posted in the wrong thread. But now I think I see that you think the answer 18 is bad logic, a non sequitur, so you posted your own non sequitur to protest. Right?

    BTW. The answer to your puzzle is trivial if using one of the many computer languages that don't have a printf function.
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  • pavani kumari

    Member • Aug 31, 2014

    Kaustubh Katdare
    Found this puzzle on LinkedIn and I think it's a good mental exercise. Not at all difficult to crack, but should give you a good 30 seconds 😀

    • 9 = 90
    • 8 = 72
    • 7 = 56
    • 6 = 42
    • 3 = ??
    If you take more than 30 seconds to crack this, you've gotta be needing some brain exercise. Spend time on CE and keep your brain engaged!
    its 18
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  • Shashank Moghe

    Member • Sep 12, 2014

    Well 18 (3-4 seconds). Also, if you (want to) intrapolate the series, the answer comes to 12. There seems to be a confusion as to which one is correct.

    If it were up to me , I would justify 18 as the correct answer because of the way the question is presented. I was not "told to" intrapolate.
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  • Karthikeyan jaisankar

    Member • Sep 13, 2014

    18!!! 😀
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  • ManojKiran Eda

    Member • Sep 19, 2014

    12
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  • Satheesh S.S

    Member • May 6, 2015

    a*(a+1) so 12
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