Thursday, January 05, 2006

NPR Sunday Puzzle (Jan 8): No "E"s allowed!

NPR Sunday Puzzle (Jan 8): No "E"s allowed!
Q: The numbers 2, 4, 6 and 30 are the first four numbers whose names lack the letter "E." What is the 23rd number whose name lacks an "E?"
So we start off 2006 with another numeric puzzle! I've seen this sequence before, called the "eban" sequence... I'll tell you my answer after the deadline, if you haven't figured it out already.
Edit: A simple search, or even just thinking about the answer would tell you what it is. Here's an article on the Eban number sequence which is sequence A006933 in the On-Line Encyclopedia of Integer Sequences. So without further ado...
A: The answer to the first puzzle of 2006 is 2006!

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