Quick Puzzle | Time Limit: 30 Seconds

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 πŸ˜€

  • 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!

Replies

  • Igneta D'Souza
    Igneta D'Souza
    12πŸ˜‰
  • Ankita Katdare
    Ankita Katdare
    18 it should be. Or is this a problem that has multiple correct answers based on assumptions or not-enough-data.
  • Manashree Thokal
    Manashree Thokal
    12
  • Anoop Kumar
    Anoop Kumar
    12 πŸ˜€
    x = x*(x+1)
  • KSS Manian
    KSS Manian
    5 = 30
    4 = 20.
    3 = 12.
    2 = 6.
    1 = 2.

    (or)

    6 = 42
    3 = 18 Which one is right???
  • Sandeep Taurean
    Sandeep Taurean
    12
  • Shailaja Tiwari
    Shailaja Tiwari
    Kaustubh Katdare
    πŸ˜€

    • 9 = 90
    • 8 = 72
    • 7 = 56
    • 6 = 42
    • 3 = ??
    time taken<20sec
    ans: 12
  • Aadit Kapoor
    Aadit Kapoor
    ans : 18 (time taken 9 seconds)

    explanation-:

    9 = 90
    8 * 9 = 72
    7 * 8 = 56
    6 * 7 = 42
    3 * 6 = 18
  • Sanyam Khurana
    Sanyam Khurana
    12..

    Took like just 2 sec πŸ˜›
  • Anoop Kumar
    Anoop Kumar
    What is logic for getting 18?
  • Shailaja Tiwari
    Shailaja Tiwari
    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 = ??
  • Anoop Kumar
    Anoop Kumar
    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 fromβ˜• and why 3 came in series after 6, while other numbers are just x-1.

    Why not x = x*(x+1).
  • Shailaja Tiwari
    Shailaja Tiwari
    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
  • Shailaja Tiwari
    Shailaja Tiwari
    anyway what's the right answer/
    😨
  • Ajay Pandey
    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.
  • Anoop Kumar
    Anoop Kumar
    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.
  • Ajay Pandey
    Ajay Pandey
    8*9=72
    7*8=56
    6*7=42
    3*6=18
    by wrong logic ......πŸ˜€ right answer is 12
  • sargam shukla
    sargam shukla
    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 πŸ˜€

    • 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
  • Aadit Kapoor
    Aadit Kapoor
    write a program to print a message without using printf function.
  • Raj A
    Raj A
    12
  • Sarathkumar Chandrasekaran
    Sarathkumar Chandrasekaran
    12
  • madhu27
    madhu27
    12 or 18 based on our assumption....
    But i think 12 suits the most....
    Took <15 s.....
  • jeshukb09
    jeshukb09
    18
  • yogi.bharadwaj
    yogi.bharadwaj
    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 πŸ˜€

    • 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
  • vijay jangid
    vijay jangid
    12
  • Karthikeyan jaisankar
    Karthikeyan jaisankar
    18πŸŽ‰
  • KenJackson
    KenJackson
    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.
  • pavani kumari
    pavani kumari
    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 πŸ˜€

    • 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
  • Shashank Moghe
    Shashank Moghe
    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.
  • Karthikeyan jaisankar
    Karthikeyan jaisankar
    18!!! πŸ˜€
  • ManojKiran Eda
    ManojKiran Eda
    12
  • Satheesh S.S
    Satheesh S.S
    a*(a+1) so 12

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