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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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Odd/Even.. | Comment 11 of 19 |
Guarenteed it is based on only a 50% chance (either it is odd or even).. the sequence seems to be odd, odd, even, even, odd, odd, ?? Which would mean the next is even.
  Posted by Paul on 2003-10-22 19:40:14
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