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  1. #1
    Silver Lounger
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    Numbers Everywhere

    Which number is the odd one out in each of the groups below?

    A) 159 367 589 258 486 679

    [img]/forums/images/smilies/cool.gif[/img] 3,459 4,268 5,279 3,145 2,134 1,235

    C) 2,743 9,418 6,813 2,917 9,461 3,724 1,972 4,819 1,836

    D) 3 35 48 52 24 8 15

    E) 133 171 208 247 285
    - Ricky

  2. #2
    Platinum Lounger
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    Re: Numbers Everywhere

    1) <span style="background-color: #FFFF00; color: #FFFF00; font-weight: bold"> 367, it is the only prime number in the series</span hide>
    Jerry

  3. #3
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    Re: Numbers Everywhere

    D <span style="background-color: #FFFF00; color: #FFFF00; font-weight: bold">52, the rest are n

  4. #4
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    Re: Numbers Everywhere

    Good spot Tony <img src=/S/clapping.gif border=0 alt=clapping width=19 height=23>
    Jerry

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    Re: Numbers Everywhere

    E. <span style="background-color: #FFFF00; color: #FFFF00; font-weight: bold">208, not evenly divisible by 19</span hide>
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  6. #6
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    Re: Numbers Everywhere

    Tony and Gary have nailed D and E. Congrats. <img src=/S/bullseye.gif border=0 alt=bullseye width=45 height=15>

    I actually had a different solution for A but I like Jerry's better so extra credit is hereby awarded... <img src=/S/trophy.gif border=0 alt=trophy width=15 height=15>

    Still to go - B & C
    - Ricky

  7. #7
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    Re: Numbers Everywhere

    [img]/forums/images/smilies/cool.gif[/img] <span style="background-color: #FFFF00; color: #FFFF00; font-weight: bold">3,459 - it's the only one in which the first digit is not the difference of the middle two digits (the last digit is the sum of the middle two)</span hide>

  8. #8
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    Re: Numbers Everywhere

    Thanks Hans - We can place B in the solved column.
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    - Ricky

  9. #9
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    Re: Numbers Everywhere

    OK, how about.........

    <span style="background-color: #FFFF00; color: #FFFF00; font-weight: bold">9,461 - as the others are "paired" with another with the same digits.
    2,743 - 3,724
    9,418 - 4,819
    6,813 - 1,836
    2,917 - 1,972 </span hide>
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  10. #10
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    Re: Numbers Everywhere

    Tricky can you pass on your solution to A, it will be interesting to see <img src=/S/cheers.gif border=0 alt=cheers width=30 height=16>
    Jerry

  11. #11
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    Re: Numbers Everywhere

    Gary - You got it <img src=/S/bullseye.gif border=0 alt=bullseye width=45 height=15>

    Jerry - My other solution for A was <span style="background-color: #FFFF00; color: #FFFF00; font-weight: bold">486 - As it's the only number in the series where the digits are not in ascending numerical order.</span hide> See, I told you your solution was better <img src=/S/smile.gif border=0 alt=smile width=15 height=15>
    - Ricky

  12. #12
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    Re: Numbers Everywhere

    Now that I enjoyed....
    Jerry

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