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Thread: Find out the next number

  1. #1
    Expert Member
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    Sep 2006
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    130

    Thumbs up Find out the next number

    Hi,

    What is the next number in this series
    5, 25, 61, 113, 181, ???, .....
    (This could be simple for so many of u )

    *** Innila ***

  2. #2
    Contributing Member
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    May 2007
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    32

    Re: Find out the next number

    next number is 265


  3. #3
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    Sep 2006
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    12

    Re: Find out the next number

    Explain!!!


  4. #4
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    Apr 2007
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    28

    Re: Find out the next number

    1^2+2^2=5, 3^2+4^2=25, 5^2+6^2=61, 7^2+8^2=113, 9^2+10^2=181, 11^2+12^2=265.


  5. #5
    Junior Member
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    Apr 2007
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    9

    Re: Find out the next number

    I´ve got same result, but another solution:
    5 -> 20 -> 61 -> 113 -> 181 -> 265
    +20 +36 +52 +68 +84
    differences between the number you have to add: always 16
    so next after 265: 265 + 84 + 16
    last result + last added number + 16


  6. #6
    Junior Member
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    Apr 2007
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    1

    Re: Find out the next number

    Quote Originally Posted by Innila View Post
    Hi,

    What is the next number in this series
    5, 25, 61, 113, 181, ???, .....
    (This could be simple for so many of u )
    What is the next number in this series
    5, 25, 61, 113, 181, ???, .

    The ans is 265.

    Solutions: 1^2+2^2 = 1 +4 = 5
    3^2+4^2 = 9+16 = 25
    5^2+6^2 = 25+36 = 61
    7^2+8^2 = 49+64 = 113
    9^2+10^2 = 81+100 = 181

    Now
    11^2 + 12^2 = 121+144 = 265


  7. #7
    Junior Member
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    Jul 2006
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    1

    Re: Find out the next number

    Quote Originally Posted by Innila View Post
    Hi,

    What is the next number in this series
    5, 25, 61, 113, 181, ???, .....
    (This could be simple for so many of u )
    5, 25 , 61 , 113 , 181

    Last edited by arun1984; 05-29-2007 at 12:02 PM.

  8. #8
    Expert Member
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    Sep 2006
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    130

    Re: Find out the next number

    Hi All,

    265 is the correct answer.
    Good job everybody :-)

    *** Innila ***

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