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Thread: Bustin' Brains

  1. #41
    Titanium Raven's Avatar
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    Quote Originally Posted by Enigma View Post
    [Moderate] Question of the Day: 4/10

    Moderate!

    Enjoy this logic problem.

    Assume the following:
    Three of these four statements are untrue.


    Mr Red: "Mr Blue did it."

    Mr Blue: "Mr Red did it."

    Mr Green: "Mr Blue's telling the truth."

    Mr Yellow: "Mr Green's not lying



    Who is the culprit?


    Mr. Blue

    Since Blue did it, Red is telling the truth, but Blue, Green, and Yellow are lying. 3 untrue statements.
    If Red did it, then Blue, Yellow, and Green are telling the truth, but only Red would be lying.
    If either Green or Yellow did it, they would all be lying.
    Last edited by Raven; 04-10-2010 at 07:56 PM. Reason: addt'l info

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  2. #42
    Osmium Enigma's Avatar
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    Quote Originally Posted by Raven View Post
    Mr. Blue
    As usual I expect the reason why. Sorry for not specifying.

  3. #43
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    Quote Originally Posted by Raven View Post
    Mr. Blue

    Since Blue did it, Red is telling the truth, but Blue, Green, and Yellow are lying. 3 untrue statements.
    If Red did it, then Blue, Yellow, and Green are telling the truth, but only Red would be lying.
    If either Green or Yellow did it, they would all be lying.
    Ha!! I got the same thing

  4. #44
    Osmium Enigma's Avatar
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    Blah, I was busy working on an essay that my English teacher assigned out of no where because he was mad at his son, but I digress.
    That is why there was no question for 4/11, but I will post one for 4/12 soon.

  5. #45
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    [Hard] Question of the Day: 4/12 has been posted.

    You may submit answers now.

  6. #46
    wattt?

  7. #47
    Titanium Raven's Avatar
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    Quote Originally Posted by Enigma View Post
    [Hard] Question of the Day: 4/12

    Hard!

    Again, I apologize for the delay.

    Assume the following:
    There are 4 people in a race that need to get across a lake. They have a small canoe. The rules say that only the slowest person in the canoe can paddle, only 1 or 2 can be in the canoe at a time, and they must all cross in the canoe.

    From practice, they know that:

    Person W can paddle across in 1 minute.

    Person X can paddle across in 2 minutes.

    Person Y can paddle across in 5 minutes.

    Person Z can paddle across in 10 minutes.

    Without breaking the rules, what is the fastest time that everyone crosses the river as a whole? How?
    19 minutes and here's how:

    Only the slowest person IN the canoe at the time can paddle, so during the race, person W stays in the canoe since he alone can paddle back across the fastest to pick up the next person. Each time across, the slower person in the canoe then paddles to get to the other side.

    W + X who paddles = 2 minutes, X gets out.
    W paddles back across alone = 1 minute.
    W + Y who paddles = 5 minutes, Y gets out.
    W paddles back across alone = 1 minute.
    W + Z who paddles = 10 minutes, both get out, all are across.

    2 + 1 + 5 + 1 + 10 = 19 minutes.


    Aw, yeah, my thinking was too linear.
    Last edited by Raven; 04-14-2010 at 04:31 AM.

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  8. #48
    Osmium Enigma's Avatar
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    The time to answer [Hard] Question of the Day: 4/12 has expired.

    A new question well be posted shortly.

  9. #49
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    [Moderate] Question of the Day 4/13 has been posted.

    You may submit answers now.

  10. #50
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    im so lost its not even funny >.<

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