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Next Number | 29 oct

Discussion in '$1 Daily Competition' started by Kshiteej, Oct 29, 2009.

  1. Kshiteej

    Kshiteej New Member

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    What is the next number in below series

    1,3,9,29,71, ?
     
  2. shabbir

    shabbir Administrator Staff Member

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    Time Starts Now :D
     
  3. sameer_havakajoka

    sameer_havakajoka New Member

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  4. Kshiteej

    Kshiteej New Member

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    Nope.
    How did you calculated it?
     
  5. sameer_havakajoka

    sameer_havakajoka New Member

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  6. sameer_havakajoka

    sameer_havakajoka New Member

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  7. xpi0t0s

    xpi0t0s Mentor

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  8. shabbir

    shabbir Administrator Staff Member

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    Its already more than 24 hours and so new entries would not be counted and any entry before this post if correct wins or else OP wins
     
  9. Kshiteej

    Kshiteej New Member

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    Consider the difference in sucessive numbers.

    3-1 = 2 = 2^2 -2 = (1st prime no )^2 - (1st prime no )
    9-3 = 6 = 3^2 -3 = (2nd prime no )^2 - (2nd prime no )
    29-9 = 20 = 5^2 -5 = (3rd prime no )^2 - (3rd prime no )
    71-29 = 42 = 7^2 -7 = (4th prime no )^2 - (4th prime no )

    So the answer is 71 + 11^2 - 11 = 181
     
  10. shabbir

    shabbir Administrator Staff Member

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    Just a suggestion. Try to reply faster if you are an OP of the competition.
     
  11. sameer_havakajoka

    sameer_havakajoka New Member

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    I was close...184
     
  12. sameer_havakajoka

    sameer_havakajoka New Member

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    I was Closed....184
     

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