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Math Help - Number Pattern sum

  1. #1
    Junior Member Dragon's Avatar
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    Number Pattern sum

    What is the value of 1-2+3-4+5-6+..............-2004+2005-2006+2007?
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  2. #2
    Senior Member OReilly's Avatar
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    Quote Originally Posted by Dragon View Post
    What is the value of 1-2+3-4+5-6+..............-2004+2005-2006+2007?
    3010
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  3. #3
    Junior Member Dragon's Avatar
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    Quote Originally Posted by OReilly View Post
    3010
    how did u get that and i dont think that is right
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  4. #4
    Senior Member OReilly's Avatar
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    Quote Originally Posted by Dragon View Post
    how did u get that and i dont think that is right
    It's not right.
    It was just a test to see if you are going to accept that value blindfully.

    Correct result is 1-2+3-4+5-6+..............-2004+2005-2006+2007=-1003+2007=1004
    Last edited by OReilly; May 9th 2007 at 06:33 PM.
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