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Math Help - which two numbers do not belong in here?

  1. #16
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    Quote Originally Posted by labrador007 View Post
    It was just a question from my son's IQ Maths which he asked me.

    As i am not sure if my answer is correct i ask for opinion here.

    However, I cannot fathom how there can be 66 answers all with logical reasoning.
    sorry, the comment was never meant to be offensive, just curious to know how there can be so many other answers.

    But personally i doubt those pairs singled out as divisible by such and such etc, and adding up to another number could be the answer expected of a 14 year old kid.

    Looks like i still place my bet on those 2 odd numbers.

    Thanks anyway.
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  2. #17
    Super Member TheChaz's Avatar
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    Quote Originally Posted by labrador007 View Post
    sorry, the comment was never meant to be offensive, just curious to know how there can be so many other answers.

    But personally i doubt those pairs singled out as divisible by such and such etc, and adding up to another number could be the answer expected of a 14 year old kid.

    Looks like i still place my bet on those 2 odd numbers.

    Thanks anyway.
    In my experience, mathematicians (and "wanna-be" mathematicians) really get bent out of shape with these kind of soft/"ill-posed" questions.

    It's all pedantic, an accusation that has never been aimed at me

    Maybe we should just ask, after giving them the list/table and a scantron with only bubbles A, B, ... K, L (12 bubbles), "which numbers would you choose, and why?"
    Maybe some of these geniuses would leave the question blank, or bubble them ALL in! Who knows??

    I like the odd argument, and the argument in post #15.
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  3. #18
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    One more reason to not trust IQ tests.
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  4. #19
    Super Member Quacky's Avatar
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    When I realised (with a shock) that \dfrac{756}{54}=14, I thought I was on to something. Especially when I then found out that \frac{644}{92}=7. 5196 divides into 4. 8 obviously divides into 2. That leaves 17,298,2134, 8843.

    ...are there any pairs from those? Nope!

    Damn!

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  5. #20
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by Quacky View Post
    5196 divides into 4. 8 obviously divides into 2.


    So.... \frac{2}{8} is what?



    -Dan
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  6. #21
    Super Member Quacky's Avatar
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    Quote Originally Posted by topsquark View Post


    So.... \frac{2}{8} is what?



    -Dan
    Oh honestly!

    \Omega + Dan =
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  7. #22
    Super Member Quacky's Avatar
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    Quote Originally Posted by Quacky View Post
    When I realised (with a shock) that \dfrac{756}{54}=14, I thought I was on to something. Especially when I then found out that \frac{644}{92}=7. 5196 divides into 4. 8 obviously divides into 2. That leaves 17,298,2134, 8843.

    ...are there any pairs from those? Nope!

    Damn!

    Ok allow me to try this again (you'll be peeved when I solve this):

    \dfrac{756}{54}=14

    \frac{644}{92}=7.

    I'm confident thus far. That leaves a jumble between 2,4,8,17,298,
    2134, 5196, 8843

    17 must be one of the misplaced numbers: It doesn't divide evenly into anything.

    2,4,8,298, 2134, 5196, 8843

    That then means that 8843 must be another: nothing divides evenly into that.
    2,4,8,298, 2134, 5196
    Can I make this work??

    5196/4 gives a clean answer, but that is all.
    2134/2 gives a clean answer, again no other options.

    That means that all I need is for 298/8 to be an integer :-

    And guess what: it isn't. Whyyyyyyy couldn't it be 296?

    Damn!

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  8. #23
    Forum Admin topsquark's Avatar
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    Quote Originally Posted by Quacky View Post
    That means that all I need is for 298/8 to be an integer :-

    Actually \frac{298}{8} \equiv 2~\text{(mod 3)}.

    Buwahahaha!

    Okay, I'll stop now.

    -Dan
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  9. #24
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    Btw, 8843 ain't a prime number; 8843 / 37 = 239

    Soooooo: 2 and 17 are the ..........
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  10. #25
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    4--------- ?--------- 8
    17-------- 54 --------92
    298 ------756------- ?
    2134 ----5196------ 8843

    2 and 644, since going from "left to right" or "top to bottom", the number are always increasing.
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  11. #26
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    Quote Originally Posted by dkmathguy View Post
    4--------- ?--------- 8
    17-------- 54 --------92
    298 ------756------- ?
    2134 ----5196------ 8843

    2 and 644, since going from "left to right" or "top to bottom", the number are always increasing.
    i like this answer too besides the 2 odd numbers.
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