riddle

  1. D

    Prisoner Hat Riddle

    Not really heavy into the math, but a challenge in logic. I found it puzzling, but the answer is surprisingly simple. Thought I would share it here. The Prisoner Hat Riddle by Alex Gendler on TED Ed. http://ed.ted.com/lessons/can-you-solve-the-prisoner-hat-riddle-alex-gendler
  2. S

    Math Riddle, Discrete Maths!

    Anyone into riddles? I've got funny one. ​The Math Riddle Question: Where is the koala? There are five houses, each of a different color and inhabited by men from different territories, with one unique animal*, drink, and car. Some facts are given: 1. The Tasmanian lives in the red house. 2...
  3. S

    Math Riddle Help!

    So I have this question that I need help with: For her dinner, Ricky invited many persons to be seated around a round table. She prepared a lovely table plan but all of her guests arrived and took a seat so that everyone was sitting in front of somebody else’s place. Is it possible to turn the...
  4. S

    Math Riddle Help!

    So I have this question that I need help with: For her dinner, Ricky invited many persons to be seated around a round table. She prepared a lovely table plan but all of her guests arrived and took a seat so that everyone was sitting in front of somebody else’s place. Is it possible to turn the...
  5. E

    Conical Helix Riddle

    Hi there. I have been trying to figure this one out for weeks now without any success. I wonder if someone here can help me out. I'm working on a sound experiment. My goal is to turn the 360 degrees of a circle into musical pitches. This post is copied from a facebook dialogue, hence the weird...
  6. C

    brain teaser optimization problem

    find the maximum length of the red ribbon around the present
  7. S

    An analytic Geometry Riddle about Locus.

    OC starts from (0,0) AB is a line segment that has a midpoint C(because OC is touching it at C) Slope of OC is Tan60.Coordinates of A is (SQRT3,1)Find the equation of locus of point B.
  8. N

    Logical riddle (Murder Mystery)

    I have a logical riddle that I need help solving : There has been a murder and four suspects are being interrogated. *A says that B did it. *B denies responsibility, and says it was D. *C adds that it wasn't him. *D declares that B lied. We know that only one person told the truth. But...
  9. R

    Logic riddle

    There are ten columns arranged horizontally, and an invisible man jumping above them, one random jump to the left or to the right, from column to column. Our goal is to shoot this invisible man with a rifle. What is the minimal number of shots required to guarantee that we will hit him? Thanks...
  10. L

    simple algebra riddle

    6÷2(1+2)=? 1 or 9 the answer is !!! i think it is 1 6/2*3 = 6/6=1(Headbang)
  11. S

    Pirate Treasure Riddle (Fun!)

    Five pirates are trying to split up 1000 gold pieces. The rules are as follows: Pirate #5 must divide the gold up in such a way that a majority of the pirates (including himself) agree to. If he does not get a majority vote, he will be killed, and pirate #4 will get to propose a solution to...
  12. N

    Riddle

    A farmer has a total of 33 cows and chickens. Altogether the animals have 90 feet. How many cows and chickens are there? Can someone give me the two equations you set up to solve this? Thanks.
  13. T

    A hard riddle!

    Hello there! I didn't manage to solve a specific math riddle (anyway, i'm not a maths freak), maybe you can, so here it is: where you can notice that: An=n Cn=An+Bn Σ Cn= Σ odd Cn + Σ even Cn The "odd Cn" and "even Cn" columns must be filled respectively with odd...
  14. P

    Christmas Math Riddle with Complex Numbers

    I have a bonus question I am trying to figure out. What does Santa Claus have in common with the "Northern most" 8th Root of 1? The only thing I was able to come up with was that +i is on the Imaginary Axis going north in essence, Any other input?
  15. D

    The 10 gallon hat.

    anyway i was telling my friend a riddle about a dude who just bought a 10 gallon hat but its really 6 gallons and all this determining of its real volume but he interrupted me and claimed that no one can have a 10 gallon hate because no one can have a 10 gallon head. I found one gallon is 3785.4...
  16. D

    please help this math riddle has been killing me...

    An amazing BLC tournament is taking place at the moment. A total of 97 teams competing each other to determine the champ. It's sponsored by theShrimp and the winning team will win one invite to the closed beta . The way the winner is chosen for this tournament is the well known elimination...
  17. C

    Silly microsoft lateral thinking riddle

    This is a lateral thinking problem, so there are pottentialy many possible answers. Question: Why are manhole covers round? I came up with one answer, then someone told me a diffrent one that is more elegant.
  18. mfetch22

    HELP!? Vector Riddle, anybody up for solving this problem? I've given up.

    This question involves 3 dimensions, but I will start in 2 dimension to get a better fit explaination. Its been bothering me for a couple days and I've been unsuccesful as getting an simple answer (I am able to derive an answer, but it seems to complicated to be reasonable).(Thinking) So, 2D...
  19. Zel

    Riddle

    1+1=95929129159156 How is this so?
  20. I

    Help

    Here are two mathematic problems that I require help solving... Brain teasers if you will! If you have any thoughts/suggestions on how to solve these please feel free to post! Thanking you in advance for your help! 1. Jimmy likes to arrange his marbles in different ways. One day he observed...