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    The Curious Incident of the Dog

    The dog was resting at home. It was 35 years old. :)
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    Login problem

    I didn´t know this one... very, very nice. thks!!
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    Login problem

    The biologon is by the ***? Nothing is wrong with the computer!
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    IQ test 2

    The answer is:
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    Traversing three rooms

    Some parts of the solution:
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    IQ test

    The answer is: Logic is:
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    Prisoner and Hats puzzle (variation)

    The #1´s hat is: Logic:
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    Traversing three rooms

    I bypass the minor "tricky" statements - no problem to identify the doors (and no problemas with the knobs). I try to see he questions as fair as logical. So, it seems a matter of determine slices of time (8 unknown and 2 known - 10 slices). And to measure time we need a reference. So we can...
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    Traversing three rooms

    Do you think heart beat rate a usefull way for time measuring?
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    Traversing three rooms

    A few years ago a tryed to solve this problem. A got some reasonable solutions and one very good solution (I think the central question is to obtain a accurate way to masure time) but I don´t know if it´s the best one. This problem is from sigmasociety.com: An Arab man and an Israeli woman...
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    Cutting the cake

    No cuts (zero) and one piece! 2 cuts and 3 pieces!
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    The Curious Incident of the Dog

    As Jonathan said, there is no 3 and 5 multiples and no 3 and 5 digits either.
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    The Curious Incident of the Dog

    The answer is:
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    What is next?

    ,91,101,..
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    Infinite String and Letter Puzzle

    I Think it´s:
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    Recreational Math

    This is one the answer:
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    Tricky math problem

    OK, I got it...it´s really simple to get the answer to x2+y2+z2=?.... That´s the tricky way...
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    Tricky math problem

    At a glance:
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    Tricky math problem

    Ok...that was prety hard to solve...it took many hours. I hope you have an easier way to get the answer (tricky):
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    Tricky math problem

    I got the answer but i cant´t get the values os x, y and z, but i got that x.y.z =
  21. L

    Complex Engineering Puzzle

    There must be a value each hour. But maybe a value anytime. So, it´s easy...
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    Walking home from station

    jimmysnyder got it. He was very fast!
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    Walking home from station

    I think it´s not important the different speed and distance anyway (to n from subway). You right, his wife didn´t know!
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    Walking home from station

    Everyday a man comes from work and get out the train, at station, at 5 PM. At the same time, everyday, his wife, driving a car, takes him and they go home. One day, the man leaves his work early and get on the sation at 4 PM. So, he decides to go home walking. On the way home, he meets his...
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    Bertrand's Box Paradox and Monty Hall Problem

    Monty Hall Problem: it´s easy to understand it with 10 doors. There is a 1/10 possibilty of picking the correct door and 9/10 possibility of picking the wrong door. You make your choice. And after 8 of the empty doors has been revealed, you choice still 1/10 possibilty of picking the correct...
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    Two pieces, side by side, are falling down, into vacuum, by the only

    Two pieces, side by side, are falling down, into vacuum, by the only attraction of a planet gravity. One is 1.000 Tons weight and the other piece is 0,001 Tons weight. Wich one is going to hit the planet´s ground first?
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    Perimeter and radius

    Your way is much better! Thanks.
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    Perimeter and radius

    It´s been boring here and I just tried to show something that breaks the common sense. Now I see I didn´t. I´ll try harder next time...
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    Perimeter and radius

    First, try to use your own sense. Take a twine (rope) and put it around a ball, or an orange (sphere). Now you have the circumference (perimeter) of that sphere. Take this twine and add 1m more (one more meter - it can be any unit of liner measure). Put this one meter longer twine around...
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    Which coin is fake?

    I´m sorry, that was 100%.
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