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Difficult Sequence (Posted on 2003-10-18) Difficulty: 5 of 5
What is the next number in the sequence? 21,45,66,102,115,171,?

See The Solution Submitted by Freddy Grants    
Rating: 3.6667 (9 votes)

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re: An alternate approach | Comment 8 of 19 |
(In reply to An alternate approach by Brian Smith)


You wrote "21, 66, 171, X". I think you meant "21, 66, 115, X". The rest of your argument is straightforward... but I sincerely hope that this is not what Freddy had in mind.
  Posted by SilverKnight on 2003-10-21 13:31:52

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