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Thread: 9s

  1. 11-27-2006 #1
    jamesravid
    jamesravid is offline
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    9s

    How many numbers are there in the list 1, 2, 3, 4, 5, …, 10 000 which
    contain exactly two consecutive 9’s such as 993, 1992 and 9929 but NOT
    9295 or 1999?

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  2. 11-27-2006 #2
    psuresh1982
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    Smile Re: 9s

    Totally 261 consecutive 9's are there...

    -------------------
    suresh

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  3. 11-27-2006 #3
    jamesravid
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    Re: 9s

    Very correct Answer. Please leave solution here.

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