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Someone who's good at logic puzzles, explain this to me!

Discussion in 'Off Topic [BG]' started by Lokire, Mar 6, 2008.


  1. So I've got this "Mensa Puzzle Calender" with a different puzzle every day, and this one is tearing my mind apart. It seems simple and I got my answer, but the 'correct' answer on the back is different from mine and I swear they're wrong! :p Here it is:

    _______________________________

    In your top drawer are two pairs of gloves in white and three pairs in black - all the same because you like the style. How many gloves must you take out (without looking) to guarantee a matched pair?
    ________________________________

    Keep in mind that they have to match color and be a Left / Right pair. Let me know what your answer is, and in a while I'll let you know mine and what the 'correct' answer is...
     
  2. Ericman197

    Ericman197

    Feb 23, 2004
    Iowa
    You need to take out at least 6 gloves to guarantee a matching pair:

    black right
    black right
    black right
    white left
    white left
    no choice but black left or white right, so on the sixth draw you win.

    That is unless the gloves can be worn the wrong way, inside out or some other trick hurrrr
     
  3. Ericman197

    Ericman197

    Feb 23, 2004
    Iowa
    This gentleman is 100% correct, now let's hear it
     
  4. I want to hear one more person's response first ;)
     
  5. My Dad easily made the Mensa requirements and ALWAYS had those god damned logic puzzles, brain bending riddles and sequential number problems. As a teacher he could always spot students with an above average IQ and worked with them on his own time. Needless to say the Mensa IQ isn't automatically passed along :mad: My daughter is VERY good with the problem solving and has been since she was old enough to read. She started reading pretty much on her own and VERY early age. I wish my Dad was still around to work with her. He believed that with practice and coaching, one could improve their IQ scores and problem solving ability. Those damn problems make me feel like a total dumbass, which, well..............:rollno: :mad:
     
  6. If they're like glove liners (can be worn on either hand), you only have to take out 3.
     
  7. Ericman197

    Ericman197

    Feb 23, 2004
    Iowa
    that's cheating and you and i both know it
     
  8. Yeah, there's no trick like that. Just a straight-forward question, as far as I can tell.
     
  9. need4mospd

    need4mospd

    Dec 22, 2005
    Houston
    D - All of the above.

    :bag:
     
  10. I know... I was just kidding. :p

    I'm guessing that since the most gloves that one can remove from the drawer without getting a matching pair is 5 (e.g. all left gloves), then the answer should be 6.

    Did the calendar say 5?
     
  11. Ok, I quickly came up with the exact same answer and reasoning as Ericman. My answer was 6. It's pretty easy, right? Here's the official answer from the back of the calender question page:


    Answer: 5 (you need to consider color and handedness)


    What the hell?!?!?! I've tried thinking of any little trick or other solutions and there is no way I can come up with 5 as the answer. This is mensa, they're supposed to be smart, I don't get it :bawl:

    I realize that 5 could be the answer IF they had said "how many could you pull BEFORE getting a matched pair on the next pull", or something crafty like that, but that wasn't the wording. I thought the wording on the question was very clear.
     

  12. Maybe the question was originally worded to be either "how may gloves can you take out without getting a matching pair," or "how many gloves must you take out to guarantee that the next draw results in a matching pair;" and they reworded the question without changing the answer. :confused:

    Also, consider that the printing company who made the calendars is probably not staffed with Mensans, and there could have been a printing error.
     
  13. craigb

    craigb G&L churnmeister Supporting Member

    Having googled and found out what the "correct" answer is my take is that it comes down to your definition of "matched pair"

    If "matched pair" means a same color pair of gloves you can wear (L+R) then I agree that the minimum number is 6

    However if "matched pair" means a pair of identical gloves (same color, same handedness) then the minimum number is 5

    You'd think folks writing a mensa puzzle could make it unambiguous
     
  14. Ah-ha! That must be it. That's a dumb trick though. When people refer to a 'pair' of gloves, they always mean left and right. Bah :p
     
  15. This is true. Maybe the "Mensa" part of the question is to see if you realize what a "matching pair" is.
     
  16. seventhson

    seventhson Supporting Member

    Aug 12, 2005
    Seattle, WA
    "Keep in mind that they have to match color and be a Left / Right pair."

    That implies that each pair has a leftie and rightie...
     
  17. seventhson

    seventhson Supporting Member

    Aug 12, 2005
    Seattle, WA
    yea, that's bull**** on mensa's part.
     
  18. Actually, I added that part. Since the answer said to keep "handedness" in mind. I just assumed that a pair meant left/right, just like a always does with gloves. Guess I was wrong :p
     
  19. doctorjazz

    doctorjazz

    Oct 22, 2006
    Wilmington, NC
    I'm mesmerized by seventhson's avatar. Screw logic.
     
  20. hey

    hey

    Jul 8, 2006
    Wisconsin
    1. Just look in and pick a matching pair the first time. Screw the not looking rule. :D
     

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