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Math Help - Trick Questions

  1. #61
    Super Member malaygoel's Avatar
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    Recently, my seniors took an interview of me. They asked me a puzzle which is as follows:
    You to express 24 with the help of four zeros(0000). You can use any mathematical symbol.

    Keep Smiling
    Malay
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  2. #62
    Member Glaysher's Avatar
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    Quote Originally Posted by malaygoel
    Recently, my seniors took an interview of me. They asked me a puzzle which is as follows:
    You to express 24 with the help of four zeros(0000). You can use any mathematical symbol.

    Keep Smiling
    Malay
    No other limitations?

    24+0+0+0+0

    \frac{2400}{100}
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  3. #63
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    Hello, Malay!


    Express 24 with the help of four zeros (0000). You can use any mathematical symbols.

    Answer hidden . . . drag your cursor across the asterisks.

    * (0! + 0! + 0! + 0!)! *

    ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

    An oldie . . . Express 64 with two 4's.

    * 4^(sqrt{sqrt{sqrt{4!}}} *


    Edit: corrected error ... sorry!
    Last edited by Soroban; October 3rd 2006 at 06:36 AM. Reason: Corrected error
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  4. #64
    Member Glaysher's Avatar
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    Quote Originally Posted by Glaysher View Post
    No other limitations?

    24+0+0+0+0

    \frac{2400}{100}
    Quote Originally Posted by Soroban View Post
    Hello, Malay!



    Answer hidden . . . drag your cursor across the asterisks.

    * (0! + 0! + 0! + 0!)! *

    ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

    An oldie . . . Express 64 with two 4's.

    So needed line 'without using any other numbers'. Thought it sounded too easy.
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  5. #65
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    Quote Originally Posted by ThePerfectHacker View Post
    Let X be a non-empty set and let ~ be a relation on X. Why is it that we say need to check reflexisve property if we can show it is it true from symettry and transitivity? Observe, if x~y then y~x (symettric) but then, x~x (transitive). Therefore it is reflexsive!?!?
    Either nobody liked it or nobody got it.
    That reasoning is wrong. Because in order to be reflexsive a relation much have the propery that x~x for all x. Now, transitive and reflexsice need not to apply to all elements.
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  6. #66
    Newbie j.c.'s Avatar
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    why cant you math freaks have a conversation without it turning into a bunch of numbers & signs that regular people cant understand?
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  7. #67
    Grand Panjandrum
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    Quote Originally Posted by j.c. View Post
    why cant you math freaks have a conversation without it turning into a bunch of numbers & signs that regular people cant understand?
    .. sorry, but what does the frequency of someones bowel movements have
    to do with the price of bacon?

    RonL
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  8. #68
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    Symmetry and Transitivity alone do not imply reflexivity. The empty relation in fact vacuously satisfies symmetry and transitivity.
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  9. #69
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    Quote Originally Posted by j.c. View Post
    why cant you math freaks have a conversation without it turning into a bunch of numbers & signs that regular people cant understand?
    Becuase we are obsessed with it.

    Quote Originally Posted by BubbleBrain
    Symmetry and Transitivity alone do not imply reflexivity. The empty relation in fact vacuously satisfies symmetry and transitivity.
    I already posted a solution in white you need to move mouse over it. Basically, for reflexsivity to exist it must use all the elements but a combination of symettry and transitivity do not.

    If I ever become an abstract math professor I would include such a question on an exam. I think it is nice problem, would you not agree? (but you probably got that immediately, but still nice).
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  10. #70
    MHF Contributor Quick's Avatar
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    Angry real-life scenario

    Here's a probability question:

    Quick's school football team=x
    Other school football team=y

    if x and y are playing against eachother, and the lead ref is biased, then the percentage of penalties against x is 120% (more penalties called then penalties) and y is 5%

    by the end of the game, what is the probability Quick will be frustrated
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  11. #71
    Newbie j.c.'s Avatar
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    Quote Originally Posted by Quick View Post
    Here's a probability question:

    Quick's school football team=x
    Other school football team=y

    if x and y are playing against eachother, and the lead ref is biased, then the percentage of penalties against x is 120% (more penalties called then penalties) and y is 5%

    by the end of the game, what is the probability Quick will be frustrated
    I thought these were suposed to be trick questions rather than probability questions, that is what I meant in my last post.
    maybe you should make a different thread named after whatever it is you are talking about.
    see rule #8
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  12. #72
    MHF Contributor Quick's Avatar
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    Quote Originally Posted by j.c. View Post
    I thought these were suposed to be trick questions rather than probability questions, that is what I meant in my last post.
    maybe you should make a different thread named after whatever it is you are talking about.
    see rule #8
    1) I created this thread and I know it's purposes

    2) My question was completely rhetorical (did you read through it?)

    3) I have 740+ posts, I think I know the rules.
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  13. #73
    Member classicstrings's Avatar
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    Quote Originally Posted by Soroban View Post
    Hello, Malay!



    Answer hidden . . . drag your cursor across the asterisks.

    * (0! + 0! + 0! + 0!)! *

    ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~ ~

    An oldie . . . Express 64 with two 4's.

    * (sqrt{sqrt{sqrt{4!}}} *
    I dont get the Express 64 question. How do you solve it? When you square root 4! three times dont you get 1.48?
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  14. #74
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    I came up with another one.

    Who was the first person born?
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  15. #75
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by ThePerfectHacker View Post
    I came up with another one.

    Who was the first person born?
    In Judeo-Christian theology that would be Cain, I believe. At least I think he was born before Abel.

    I don't know who that would be in, say, the Hindu religion.

    Other than that, my bet's with the chicken.

    -Dan
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