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What is the next number? (Posted on 2005-02-20) Difficulty: 3 of 5
What is the next number in the following series: 17 15 14 13 13 14 17 23 ?

  Submitted by Swastika Shrivastava    
Rating: 1.2500 (4 votes)
Solution: (Hide)
The answer is :34. The difference between the consecutive numbers is: -2 -1 -1 0 1 3 6. Adding +2 to each of the numbers gives 0 1 1 2 3 5 8 which is the fibonacci series! Next number in the fibonacci series is 13.Subtracting 2 from 13 gives 11.Adding 11 to the last number 23 of the original series gives 34!! Hence the answer is 34.

Comments: ( You must be logged in to post comments.)
  Subject Author Date
SolutionPuzzle SolutionK Sengupta2008-06-04 00:49:49
answerK Sengupta2007-04-07 11:12:47
No SubjectAngela2005-04-29 20:43:55
Me answerMike hunt2005-03-19 23:21:47
No SubjectRex2005-02-22 14:46:32
SolutionSolutione.g.2005-02-21 14:10:34
solutionparvez2005-02-21 13:22:57
solutionJessica2005-02-21 09:20:29
re(2): SOLUTIONmomo2005-02-20 19:28:24
re: SOLUTIONsuman2005-02-20 18:28:26
re: SOLUTIONHugo2005-02-20 18:27:35
SOLUTIONmomo2005-02-20 16:49:04
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